Merge pull request 'Double frames' (#6) from dev into master

Reviewed-on: #6

CHANGELOG.md

@@ -1,55 +0,0 @@
-Versions before 2.1.2 have been backfilled; I gotta be more on top of changelogs.
-
-# next version (unreleased)
-
-* Start sketching out a proper API, accessible through `TemplatesClientApi.getInstance()`.
-	* Not everything has been moved into the API package yet for ABI reasons.
-* Code cleanups that hopefully didn't break ABI compat
-* Remove some unused stuff from the jar
-* Vertical slab placement no longer completely sucks
-* Fix a bug where templates that look like blocks with randomized models, such as stone, could reroll their blockstate on every resource load.
-  * Forgot to specify a random seed.
-  * All templated blocks still use the *same* model, so templated stone will still not be randomly rotated/flipped, but at least it's now the *same* same model.
-
-road map:
-
-* want to fix texture orientation on vertical slabs/doors
-* really want to fix the way vertical slabs place lmao (it's so buggy)
-* clean up `StairShapeMaker`
-
-# 2.1.1 (Aug 2, 2023)
-
-Enable ambient-occlusion ("smooth lighting") on all Templates except for the slopes, which are still bugged
-
-# 2.1.0 (Jul 31, 2023)
-
-* Add a vertical slab template
-* Add a "tiny slope" template
-* Change the block entity NBT format to be much smaller
-* Reduce memory footprint of the block entity
-* Respect `doTileDrops`
-* Improve creative ctrl-pick behavior on glowing Templates
-* Adding a Barrier block to a Template makes it remove its model (not unbreakable)
-
-# 2.0.4 (Jul 25, 2023)
-
-* Apply more block tags
-* Apply item tags
-
-# 2.0.3 (Jul 23, 2023)
-
-* add Door and Iron Door templates
-* cool rivulet
-
-# 2.0.2 (Jul 20, 2023)
-
-* Add an Iron Trapdoor template
-* Add some more mod metadata (change name to "Templates 2", add authors, fix sources link)
-
-# 2.0.1 (Jul 11, 2023)
-
-Fix a duplication glitch with the Stair Template, which was retaining its block entity after being broken.
-
-# 2.0.0 (Jul 11, 2023)
-
-Initial release

build.gradle

@@ -94,7 +94,7 @@ dependencies {
 
 	// Chipped to test athena implementation
 	modRuntimeOnly "com.teamresourceful.resourcefullib:resourcefullib-fabric-${project.minecraft_version}:2.4.7"
-//	modRuntimeOnly "earth.terrarium.chipped:chipped-fabric-${project.minecraft_version}:3.1.2" TODO not working for some reasons
+	modRuntimeOnly "earth.terrarium.chipped:Chipped-fabric-${project.minecraft_version}:3.1.2"
 
 	// Fabric API. This is technically optional, but you probably want it anyway.
 	modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"

gradle.properties

@@ -8,7 +8,7 @@ yarn_mappings=1.20.4+build.3
 loader_version=0.15.6
 
 # Mod Properties
-mod_version = 1.2
+mod_version = 1.3
 maven_group = fr.adrien1106
 archives_base_name = ReFramed
 mod_id = reframed

src/main/java/fr/adrien1106/reframed/ReFramed.java

@@ -25,15 +25,16 @@ import java.util.function.BiConsumer;
 import java.util.stream.Collectors;
 
 /**
- * TODO multiple camos
+ * TODO self culling, fix other models, better connected textures
  */
 public class ReFramed implements ModInitializer {
 	public static final String MODID = "reframed";
 
 	public static final ArrayList<Block> BLOCKS = new ArrayList<>();
-	public static Block CUBE, STAIRS, SLAB, POST, FENCE, FENCE_GATE, DOOR, TRAPDOOR, IRON_DOOR, IRON_TRAPDOOR, PRESSURE_PLATE, BUTTON, LEVER, WALL, CARPET, PANE, CANDLE;
+	public static Block CUBE, STAIRS, DOUBLE_STAIRS, SLAB, DOUBLE_SLAB, POST, FENCE, FENCE_GATE, DOOR, TRAPDOOR, IRON_DOOR, IRON_TRAPDOOR, PRESSURE_PLATE, BUTTON, LEVER, WALL, CARPET, PANE, CANDLE;
 
 	public static BlockEntityType<ReFramedEntity> REFRAMED_BLOCK_ENTITY;
+	public static BlockEntityType<ReFramedDoubleEntity> REFRAMED_DOUBLE_BLOCK_ENTITY;
 
 	public static BiConsumer<World, BlockPos> chunkRerenderProxy = (world, pos) -> {};
 	
@@ -46,7 +47,9 @@ public class ReFramed implements ModInitializer {
 		//and button, because they're redstoney... hopefully this ordering makes sense lol
 		CUBE           = registerReFramed("cube"          , new ReFramedBlock(ReFramedInteractionUtil.makeSettings()));
 		STAIRS         = registerReFramed("stairs"        , new ReFramedStairsBlock(cp(Blocks.OAK_STAIRS)));
+		DOUBLE_STAIRS  = registerReFramed("double_stairs" , new ReFramedDoubleStairsBlock(cp(Blocks.OAK_STAIRS)));
 		SLAB           = registerReFramed("slab"          , new ReFramedSlabBlock(cp(Blocks.OAK_SLAB)));
+		DOUBLE_SLAB    = registerReFramed("double_slab"   , new ReFramedDoubleSlabBlock(cp(Blocks.OAK_SLAB)));
 		POST           = registerReFramed("post"          , new ReFramedPostBlock(cp(Blocks.OAK_FENCE)));
 		FENCE          = registerReFramed("fence"         , new ReFramedFenceBlock(cp(Blocks.OAK_FENCE)));
 		FENCE_GATE     = registerReFramed("fence_gate"    , new ReFramedFenceGateBlock(cp(Blocks.OAK_FENCE_GATE)));
@@ -63,7 +66,19 @@ public class ReFramed implements ModInitializer {
 		CANDLE         = registerReFramed("candle"        , new ReFramedCandleBlock(ReFramedCandleBlock.configureSettings(cp(Blocks.CANDLE))));
 
 		REFRAMED_BLOCK_ENTITY = Registry.register(Registries.BLOCK_ENTITY_TYPE, id("camo"),
-			FabricBlockEntityTypeBuilder.create((pos, state) -> new ReFramedEntity(REFRAMED_BLOCK_ENTITY, pos, state), BLOCKS.toArray(new Block[0])).build(null)
+			FabricBlockEntityTypeBuilder.create(
+				(pos, state) -> new ReFramedEntity(REFRAMED_BLOCK_ENTITY, pos, state),
+				BLOCKS.stream()
+					.filter(block -> !(block instanceof ReFramedDoubleBlock))
+					.toArray(Block[]::new)).build(null)
+		);
+
+		REFRAMED_DOUBLE_BLOCK_ENTITY = Registry.register(Registries.BLOCK_ENTITY_TYPE, id("double_camo"),
+			FabricBlockEntityTypeBuilder.create(
+				(pos, state) -> new ReFramedDoubleEntity(REFRAMED_DOUBLE_BLOCK_ENTITY, pos, state),
+				BLOCKS.stream()
+					.filter(block -> block instanceof ReFramedDoubleBlock)
+					.toArray(Block[]::new)).build(null)
 		);
 		
 		Registry.register(Registries.ITEM_GROUP, id("tab"), FabricItemGroup.builder()

src/main/java/fr/adrien1106/reframed/block/ReFramedBlock.java

@@ -1,29 +1,44 @@
 package fr.adrien1106.reframed.block;
 
-import com.google.common.base.MoreObjects;
 import fr.adrien1106.reframed.ReFramed;
-import fr.adrien1106.reframed.util.ReFramedInteractionUtil;
+import fr.adrien1106.reframed.util.ReframedInteractible;
+import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.minecraft.block.*;
 import net.minecraft.block.entity.BlockEntity;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.item.ItemPlacementContext;
-import net.minecraft.item.ItemStack;
+import net.minecraft.item.*;
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.sound.SoundCategory;
+import net.minecraft.sound.SoundEvents;
 import net.minecraft.state.StateManager;
+import net.minecraft.state.property.BooleanProperty;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.Hand;
+import net.minecraft.util.ItemScatterer;
+import net.minecraft.util.collection.DefaultedList;
+import net.minecraft.util.function.BooleanBiFunction;
 import net.minecraft.util.hit.BlockHitResult;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Direction;
 import net.minecraft.util.shape.VoxelShape;
+import net.minecraft.util.shape.VoxelShapes;
 import net.minecraft.world.BlockView;
+import net.minecraft.world.GameRules;
 import net.minecraft.world.World;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.List;
+
+import static net.minecraft.util.shape.VoxelShapes.*;
+
 public class ReFramedBlock extends Block implements BlockEntityProvider {
+
+	public static final BooleanProperty LIGHT = BooleanProperty.of("frame_light");
+
 	public ReFramedBlock(Settings settings) {
 		super(settings);
-		setDefaultState(ReFramedInteractionUtil.setDefaultStates(getDefaultState()));
+		setDefaultState(getDefaultState().with(LIGHT, false));
 	}
 	
 	//For addon devs: override this so your blocks don't end up trying to place my block entity, my BlockEntityType only handles blocks internal to the mod
@@ -35,51 +50,262 @@ public class ReFramedBlock extends Block implements BlockEntityProvider {
 
 	@Override
 	protected void appendProperties(StateManager.Builder<Block, BlockState> builder) {
-		super.appendProperties(ReFramedInteractionUtil.appendProperties(builder));
+		super.appendProperties(builder.add(LIGHT));
 	}
 	
 	@Nullable
 	@Override
 	public BlockState getPlacementState(ItemPlacementContext ctx) {
-		return ReFramedInteractionUtil.modifyPlacementState(super.getPlacementState(ctx), ctx);
+		return ReFramedEntity.getNbtLightLevel(super.getPlacementState(ctx), ctx.getStack());
 	}
 	
 	@Override
 	public ActionResult onUse(BlockState state, World world, BlockPos pos, PlayerEntity player, Hand hand, BlockHitResult hit) {
-		ActionResult r = ReFramedInteractionUtil.onUse(state, world, pos, player, hand, hit);
-		if(!r.isAccepted()) r = super.onUse(state, world, pos, player, hand, hit);
-		return r;
+		if (!canUse(world, pos, player)) return superUse(state, world, pos, player, hand, hit);
+		ActionResult result = useUpgrade(state, world, pos, player, hand);
+		if (result.isAccepted()) return result;
+		return useCamo(state, world, pos, player, hand, hit, 1);
+
+	}
+
+	// don't like this but might be useful
+	protected ActionResult superUse(BlockState state, World world, BlockPos pos, PlayerEntity player, Hand hand, BlockHitResult hit) {
+		return super.onUse(state, world, pos, player, hand, hit);
+	}
+
+	protected boolean canUse(World world, BlockPos pos, PlayerEntity player) {
+		return player.canModifyBlocks() && world.canPlayerModifyAt(player, pos);
+	}
+
+	protected static ActionResult useUpgrade(BlockState state, World world, BlockPos pos, PlayerEntity player, Hand hand) {
+		if(!(world.getBlockEntity(pos) instanceof ReFramedEntity block_entity)) return ActionResult.PASS;
+
+		ItemStack held = player.getStackInHand(hand);
+		ReframedInteractible ext = state.getBlock() instanceof ReframedInteractible e ? e : ReframedInteractible.Default.INSTANCE;
+
+		// frame will emit light if applied with glowstone
+		if(state.contains(LIGHT) && held.getItem() == Items.GLOWSTONE_DUST) {
+			block_entity.toggleLight();
+			world.setBlockState(pos, state.with(LIGHT, block_entity.emitsLight()));
+
+			if(!player.isCreative())
+				if (block_entity.emitsLight()) held.decrement(1);
+				else held.increment(1);
+			world.playSound(player, pos, SoundEvents.BLOCK_GLASS_HIT, SoundCategory.BLOCKS, 1f, 1f);
+			return ActionResult.SUCCESS;
+		}
+
+		// frame will emit redstone if applied with redstone torch can deactivate redstone block camo emission
+		if(held.getItem() == Items.REDSTONE_TORCH && ext.canAddRedstoneEmission(state, world, pos)) {
+			block_entity.toggleRedstone();
+
+			if(!player.isCreative())
+				if (block_entity.emitsRedstone()) held.decrement(1);
+				else held.increment(1);
+			world.playSound(player, pos, SoundEvents.BLOCK_LEVER_CLICK, SoundCategory.BLOCKS, 1f, 1f);
+			return ActionResult.SUCCESS;
+		}
+
+		// Frame will lose its collision if applied with popped chorus fruit
+		if(held.getItem() == Items.POPPED_CHORUS_FRUIT && ext.canRemoveCollision(state, world, pos)) {
+			block_entity.toggleSolidity();
+
+			if(!player.isCreative())
+				if (!block_entity.isSolid()) held.decrement(1);
+				else held.increment(1);
+			world.playSound(player, pos, SoundEvents.ITEM_CHORUS_FRUIT_TELEPORT, SoundCategory.BLOCKS, 1f, 1f);
+			return ActionResult.SUCCESS;
+		}
+
+		return ActionResult.PASS;
+	}
+
+	protected static ActionResult useCamo(BlockState state, World world, BlockPos pos, PlayerEntity player, Hand hand, BlockHitResult hit, int theme_index) {
+		if(!(world.getBlockEntity(pos) instanceof ReFramedEntity block_entity)) return ActionResult.PASS;
+
+		// Changing the theme
+		ItemStack held = player.getStackInHand(hand);
+		if(held.getItem() instanceof BlockItem block_item && block_entity.getTheme(theme_index).getBlock() == Blocks.AIR) {
+			Block block = block_item.getBlock();
+			ItemPlacementContext ctx = new ItemPlacementContext(new ItemUsageContext(player, hand, hit));
+			BlockState placement_state = block.getPlacementState(ctx);
+			if(placement_state != null && isShapeFullCube(placement_state.getCollisionShape(world, pos)) && !(block instanceof BlockEntityProvider)) {
+				List<BlockState> themes = block_entity.getThemes();
+				if(!world.isClient) block_entity.setTheme(placement_state, theme_index);
+
+				// check for default light emission
+				if (placement_state.getLuminance() > 0
+					&& themes.stream().noneMatch(theme -> theme.getLuminance() > 0))
+						if (block_entity.emitsLight()) Block.dropStack(world, pos, new ItemStack(Items.GLOWSTONE_DUST));
+						else block_entity.toggleLight();
+
+				world.setBlockState(pos, state.with(LIGHT, block_entity.emitsLight()));
+
+				// check for default redstone emission
+				if (placement_state.getWeakRedstonePower(world, pos, Direction.NORTH) > 0
+					&& themes.stream().noneMatch(theme -> theme.getWeakRedstonePower(world, pos, Direction.NORTH) > 0))
+						if (block_entity.emitsRedstone()) Block.dropStack(world, pos, new ItemStack(Items.GLOWSTONE_DUST));
+						else block_entity.toggleRedstone();
+
+				if(!player.isCreative()) held.decrement(1);
+				world.playSound(player, pos, placement_state.getSoundGroup().getPlaceSound(), SoundCategory.BLOCKS, 1f, 1.1f);
+				return ActionResult.SUCCESS;
+			}
+		}
+
+		return ActionResult.PASS;
 	}
 	
 	@Override
 	public void onStateReplaced(BlockState state, World world, BlockPos pos, BlockState newState, boolean moved) {
-		ReFramedInteractionUtil.onStateReplaced(state, world, pos, newState, moved);
+		if(!state.isOf(newState.getBlock()) &&
+			world.getBlockEntity(pos) instanceof ReFramedEntity frame_entity &&
+			world.getGameRules().getBoolean(GameRules.DO_TILE_DROPS)
+		) {
+			DefaultedList<ItemStack> drops = DefaultedList.of();
+
+			List<BlockState> themes = frame_entity.getThemes();
+			themes.forEach(theme -> {
+				if(theme.getBlock() != Blocks.AIR) drops.add(new ItemStack(theme.getBlock()));
+			});
+
+			if(frame_entity.emitsRedstone()
+				&& themes.stream().noneMatch(theme -> theme.getWeakRedstonePower(world, pos, Direction.NORTH) != 0))
+					drops.add(new ItemStack(Items.REDSTONE_TORCH));
+			if(frame_entity.emitsLight()
+				&& themes.stream().noneMatch(theme -> theme.getLuminance() != 0))
+					drops.add(new ItemStack(Items.GLOWSTONE_DUST));
+			if(!frame_entity.isSolid()
+				&& themes.stream().anyMatch(theme -> theme.isSolid()))
+				drops.add(new ItemStack(Items.POPPED_CHORUS_FRUIT));
+
+			ItemScatterer.spawn(world, pos, drops);
+		}
 		super.onStateReplaced(state, world, pos, newState, moved);
 	}
 	
 	@Override
 	public void onPlaced(World world, BlockPos pos, BlockState state, @Nullable LivingEntity placer, ItemStack stack) {
-		ReFramedInteractionUtil.onPlaced(world, pos, state, placer, stack);
+		if(world.isClient && world.getBlockEntity(pos) instanceof ReFramedEntity be) {
+			NbtCompound tag = BlockItem.getBlockEntityNbt(stack);
+			if(tag != null) be.readNbt(tag);
+		}
 		super.onPlaced(world, pos, state, placer, stack);
 	}
 	
 	@Override
 	public VoxelShape getCollisionShape(BlockState state, BlockView view, BlockPos pos, ShapeContext ctx) {
-		return MoreObjects.firstNonNull(ReFramedInteractionUtil.getCollisionShape(state, view, pos, ctx), super.getCollisionShape(state, view, pos, ctx));
+		return isGhost(view, pos)
+			? VoxelShapes.empty()
+			: super.getCollisionShape(state, view, pos, ctx);
 	}
-	
+
 	@Override
-	public boolean emitsRedstonePower(BlockState state) {
-		return ReFramedInteractionUtil.emitsRedstonePower(state);
+	public VoxelShape getCullingShape(BlockState state, BlockView view, BlockPos pos) {
+		return isGhost(view, pos)
+			? VoxelShapes.empty()
+			: super.getCullingShape(state, view, pos);
+	}
+
+	public VoxelShape getShape(BlockState state, int i) {
+		// assuming the shape don't need the world and position
+		return getOutlineShape(state, null, null, null);
+	}
+
+	public boolean isGhost(BlockView view, BlockPos pos) {
+		return view.getBlockEntity(pos) instanceof ReFramedEntity be && !be.isSolid();
 	}
 	
 	@Override
 	public int getWeakRedstonePower(BlockState state, BlockView view, BlockPos pos, Direction dir) {
-		return ReFramedInteractionUtil.getWeakRedstonePower(state, view, pos, dir);
+		return view.getBlockEntity(pos) instanceof ReFramedEntity be && be.emitsRedstone() ? 15 : 0;
 	}
 	
 	@Override
 	public int getStrongRedstonePower(BlockState state, BlockView view, BlockPos pos, Direction dir) {
-		return ReFramedInteractionUtil.getStrongRedstonePower(state, view, pos, dir);
+		return getWeakRedstonePower(state, view, pos, dir);
+	}
+
+	public int getTopThemeIndex(BlockState state) {
+		return 1;
+	}
+
+	// Doing this method from scratch as it is simpler to do than injecting everywhere
+	public static boolean shouldDrawSide(BlockState self_state, BlockView world, BlockPos pos, Direction side, BlockPos other_pos, int theme_index) {
+		ThemeableBlockEntity self = world.getBlockEntity(pos) instanceof ThemeableBlockEntity e ? e : null;
+		ThemeableBlockEntity other = world.getBlockEntity(other_pos) instanceof ThemeableBlockEntity e ? e : null;
+		BlockState other_state = world.getBlockState(other_pos);
+
+		// normal behaviour
+		if (self == null && other == null) return shouldDrawSide(self_state, world, pos, side, other_pos);
+
+		// self is a normal Block
+		if (self == null && other_state.getBlock() instanceof ReFramedBlock other_block) {
+			VoxelShape self_shape = self_state.getCullingShape(world, pos);
+			if (self_shape.isEmpty()) return true;
+
+			int i = 0;
+			VoxelShape other_shape = VoxelShapes.empty();
+			for (BlockState s: other.getThemes()) {
+				i++;
+				if (self_state.isSideInvisible(s, side) || s.isOpaque())
+					other_shape = combine(
+						other_shape,
+						other_block
+							.getShape(other_state, i)
+							.getFace(side.getOpposite()),
+						BooleanBiFunction.OR
+					);
+			}
+
+			// determine if side needs to be rendered
+			return VoxelShapes.matchesAnywhere(self_shape, other_shape, BooleanBiFunction.ONLY_FIRST);
+		}
+
+		BlockState self_theme = self.getTheme(theme_index);
+		// other is normal Block
+		if (other == null && self_state.getBlock() instanceof ReFramedBlock self_block) {
+			// Transparent is simple if self and the neighbor are invisible don't render side (like default)
+			if (self_theme.isSideInvisible(other_state, side)) return false;
+
+			// Opaque is also simple as each model are rendered one by one
+			if (other_state.isOpaque()) {
+				// no cache section :( because it differs between each instance of the frame
+				VoxelShape self_shape = self_block.getShape(self_state, theme_index).getFace(side);
+				if (self_shape.isEmpty()) return true;
+				VoxelShape other_shape = other_state.getCullingFace(world, other_pos, side.getOpposite());
+
+				// determine if side needs to be rendered
+				return VoxelShapes.matchesAnywhere(self_shape, other_shape, BooleanBiFunction.ONLY_FIRST);
+			}
+
+			return true;
+		}
+
+		// Both are frames
+		// here both are computed in the same zone as there will necessarily a shape comparison
+		if (self_state.getBlock() instanceof ReFramedBlock self_block && other_state.getBlock() instanceof ReFramedBlock other_block) {
+			VoxelShape self_shape = self_block.getShape(self_state, theme_index).getFace(side);
+			if (self_shape.isEmpty()) return true;
+
+			int i = 0;
+			VoxelShape other_shape = VoxelShapes.empty();
+			for (BlockState s: other.getThemes()) {
+				i++;
+				if (self_theme.isSideInvisible(s, side) || s.isOpaque())
+					other_shape = combine(
+						other_shape,
+						other_block
+							.getShape(other_state, i)
+							.getFace(side.getOpposite()),
+						BooleanBiFunction.OR
+					);
+			}
+
+			// determine if side needs to be rendered
+			return VoxelShapes.matchesAnywhere(self_shape, other_shape, BooleanBiFunction.ONLY_FIRST);
+		}
+
+		return true;
 	}
 }

src/main/java/fr/adrien1106/reframed/block/ReFramedDoubleBlock.java

@@ -0,0 +1,96 @@
+package fr.adrien1106.reframed.block;
+
+import fr.adrien1106.reframed.ReFramed;
+import fr.adrien1106.reframed.util.ThemeableBlockEntity;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.ShapeContext;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.util.ActionResult;
+import net.minecraft.util.Hand;
+import net.minecraft.util.hit.BlockHitResult;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.util.shape.VoxelShape;
+import net.minecraft.world.BlockView;
+import net.minecraft.world.World;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import static net.minecraft.util.shape.VoxelShapes.empty;
+import static net.minecraft.util.shape.VoxelShapes.fullCube;
+
+public abstract class ReFramedDoubleBlock extends ReFramedBlock {
+    public ReFramedDoubleBlock(Settings settings) {
+        super(settings);
+    }
+
+    @Override
+    public @Nullable BlockEntity createBlockEntity(BlockPos pos, BlockState state) {
+        return ReFramed.REFRAMED_DOUBLE_BLOCK_ENTITY.instantiate(pos, state);
+    }
+
+    protected int getHitPart(BlockState state, BlockHitResult hit) {
+        Direction side = hit.getSide();
+        VoxelShape first_shape = getShape(state, 1);
+        VoxelShape second_shape = getShape(state, 2);
+
+        // Determine if any of the two shape is covering the side entirely
+        if (isFaceFullSquare(first_shape, side)) return 1;
+        if (isFaceFullSquare(second_shape, side)) return 2;
+
+        Vec3d pos = hit.getPos();
+        BlockPos origin = hit.getBlockPos();
+        Map<Direction.Axis, Double> axes = Arrays.stream(Direction.Axis.values())
+            .filter(axis -> axis != side.getAxis())
+            .collect(Collectors.toMap(
+                axis -> axis,
+                axis -> axis.choose(pos.getX() - origin.getX(), pos.getY() - origin.getY(), pos.getZ() - origin.getZ()))
+            );
+
+        if (matchesFace(first_shape.getFace(side), axes)) return 1;
+        if (matchesFace(second_shape.getFace(side), axes)) return 2;
+        return 0;
+    }
+
+    private static boolean matchesFace(VoxelShape shape, Map<Direction.Axis, Double> axes) {
+        return shape.getBoundingBoxes().stream()
+            .anyMatch(box ->
+                axes.keySet().stream()
+                    .map(axis -> box.getMin(axis) <= axes.get(axis) && box.getMax(axis) >= axes.get(axis))
+                    .reduce((prev, current) -> prev && current).get()
+            );
+    }
+
+    @Override
+    public boolean isTransparent(BlockState state, BlockView world, BlockPos pos) {
+        return world.getBlockEntity(pos) instanceof ThemeableBlockEntity framed_entity
+            && framed_entity.getThemes().stream().allMatch(theme -> theme.isTransparent(world, pos));
+    }
+
+    public VoxelShape getRenderOutline(BlockState state, BlockHitResult hit) {
+        return getShape(state, getHitPart(state, hit));
+    }
+
+    @Override
+    public VoxelShape getCollisionShape(BlockState state, BlockView view, BlockPos pos, ShapeContext ctx) {
+        return isGhost(view, pos) ? empty() : fullCube();
+    }
+
+    @Override
+    public VoxelShape getCullingShape(BlockState state, BlockView view, BlockPos pos) {
+        return isGhost(view, pos) ? empty() : fullCube();
+    }
+
+    @Override
+    public ActionResult onUse(BlockState state, World world, BlockPos pos, PlayerEntity player, Hand hand, BlockHitResult hit) {
+        if (!canUse(world, pos, player)) return superUse(state, world, pos, player, hand, hit);
+        ActionResult result = useUpgrade(state, world, pos, player, hand);
+        if (result.isAccepted()) return result;
+        return useCamo(state, world, pos, player, hand, hit, getHitPart(state, hit));
+    }
+}

src/main/java/fr/adrien1106/reframed/block/ReFramedDoubleEntity.java

@@ -0,0 +1,62 @@
+package fr.adrien1106.reframed.block;
+
+import fr.adrien1106.reframed.ReFramed;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.block.entity.BlockEntityType;
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.nbt.NbtHelper;
+import net.minecraft.registry.Registries;
+import net.minecraft.util.math.BlockPos;
+
+import java.util.List;
+import java.util.Objects;
+
+public class ReFramedDoubleEntity extends ReFramedEntity {
+
+    protected BlockState second_state = Blocks.AIR.getDefaultState();
+
+    public ReFramedDoubleEntity(BlockEntityType<?> type, BlockPos pos, BlockState state) {
+        super(type, pos, state);
+    }
+
+    @Override
+    public BlockState getTheme(int i) {
+        return i == 2 ? second_state : super.getTheme(i);
+    }
+
+    @Override
+    public List<BlockState> getThemes() {
+        List<BlockState> themes = super.getThemes();
+        themes.add(second_state);
+        return themes;
+    }
+
+    public void setTheme(BlockState new_state, int i) {
+        if(i == 2) {
+            if (Objects.equals(second_state, new_state)) return;
+            second_state = new_state;
+            markDirtyAndDispatch();
+        } else super.setTheme(new_state, i);
+    }
+
+    @Override
+    public void readNbt(NbtCompound nbt) {
+        super.readNbt(nbt);
+
+        BlockState rendered_state = second_state;// keep previous state to check if rerender is needed
+        second_state = NbtHelper.toBlockState(Registries.BLOCK.getReadOnlyWrapper(), nbt.getCompound(BLOCKSTATE_KEY + 2));
+
+        // Force a chunk remesh on the client if the displayed blockstate has changed
+        if(world != null && world.isClient && !Objects.equals(rendered_state, second_state)) {
+            ReFramed.chunkRerenderProxy.accept(world, pos);
+        }
+    }
+
+    @Override
+    public void writeNbt(NbtCompound nbt) {
+        super.writeNbt(nbt);
+
+        if(second_state != Blocks.AIR.getDefaultState()) nbt.put(BLOCKSTATE_KEY + 2, NbtHelper.fromBlockState(second_state));
+    }
+}

src/main/java/fr/adrien1106/reframed/block/ReFramedDoubleSlabBlock.java

@@ -0,0 +1,64 @@
+package fr.adrien1106.reframed.block;
+
+import fr.adrien1106.reframed.ReFramed;
+import fr.adrien1106.reframed.generator.GBlockstate;
+import fr.adrien1106.reframed.generator.MultipartBlockStateProvider;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.data.client.MultipartBlockStateSupplier;
+import net.minecraft.item.ItemPlacementContext;
+import net.minecraft.state.StateManager;
+import net.minecraft.state.property.Properties;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.Direction;
+import net.minecraft.util.shape.VoxelShape;
+import org.jetbrains.annotations.Nullable;
+
+import static fr.adrien1106.reframed.block.ReFramedSlabBlock.*;
+import static net.minecraft.data.client.VariantSettings.Rotation.*;
+import static net.minecraft.state.property.Properties.AXIS;
+
+public class ReFramedDoubleSlabBlock extends ReFramedDoubleBlock implements MultipartBlockStateProvider {
+    public ReFramedDoubleSlabBlock(Settings settings) {
+        super(settings);
+        setDefaultState(getDefaultState().with(Properties.AXIS, Direction.Axis.Y));
+    }
+
+    @Override
+    protected void appendProperties(StateManager.Builder<Block, BlockState> builder) {
+        super.appendProperties(builder.add(Properties.AXIS));
+    }
+
+    @Nullable
+    @Override
+    public BlockState getPlacementState(ItemPlacementContext ctx) {
+        return super.getPlacementState(ctx).with(Properties.AXIS, ctx.getSide().getAxis());
+    }
+
+    @Override
+    public VoxelShape getShape(BlockState state, int i) {
+        return switch (state.get(Properties.AXIS)) {
+            case Y -> i == 2 ? UP    : DOWN;
+            case Z -> i == 2 ? NORTH : SOUTH;
+            case X -> i == 2 ? EAST  : WEST;
+        };
+    }
+
+    @Override
+    public int getTopThemeIndex(BlockState state) {
+        // when the side is shared just return one
+        return state.get(AXIS) == Direction.Axis.Y ? 2: super.getTopThemeIndex(state);
+    }
+
+    @Override
+    public MultipartBlockStateSupplier getMultipart() {
+        Identifier model_id = ReFramed.id("double_slab_special");
+        return MultipartBlockStateSupplier.create(this)
+            .with(GBlockstate.when(AXIS, Direction.Axis.Y),
+                GBlockstate.variant(model_id, true, R0, R0))
+            .with(GBlockstate.when(AXIS, Direction.Axis.Z),
+                GBlockstate.variant(model_id, true, R90, R0))
+            .with(GBlockstate.when(AXIS, Direction.Axis.X),
+                GBlockstate.variant(model_id, true, R90, R90));
+    }
+}

src/main/java/fr/adrien1106/reframed/block/ReFramedDoubleStairsBlock.java

@@ -0,0 +1,187 @@
+package fr.adrien1106.reframed.block;
+
+import fr.adrien1106.reframed.generator.MultipartBlockStateProvider;
+import fr.adrien1106.reframed.util.property.StairDirection;
+import fr.adrien1106.reframed.util.property.StairShape;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.data.client.MultipartBlockStateSupplier;
+import net.minecraft.item.ItemPlacementContext;
+import net.minecraft.state.StateManager;
+import net.minecraft.util.function.BooleanBiFunction;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.util.shape.VoxelShape;
+import net.minecraft.util.shape.VoxelShapes;
+import net.minecraft.world.World;
+import net.minecraft.world.WorldAccess;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static fr.adrien1106.reframed.block.ReFramedStairsBlock.*;
+import static fr.adrien1106.reframed.util.property.StairShape.STRAIGHT;
+
+public class ReFramedDoubleStairsBlock extends ReFramedDoubleBlock implements MultipartBlockStateProvider {
+
+    private static final List<VoxelShape> COMPLEMENT_LIST = new ArrayList<>(52);
+
+    public ReFramedDoubleStairsBlock(Settings settings) {
+        super(settings);
+        setDefaultState(getDefaultState().with(FACING, StairDirection.NORTH_DOWN).with(SHAPE, STRAIGHT));
+    }
+
+    @Override
+    protected void appendProperties(StateManager.Builder<Block, BlockState> builder) {
+        super.appendProperties(builder.add(FACING).add(SHAPE));
+    }
+
+    @Override
+    public BlockState getStateForNeighborUpdate(BlockState state, Direction direction, BlockState neighbor_state, WorldAccess world, BlockPos pos, BlockPos moved) {
+        return super.getStateForNeighborUpdate(state, direction, neighbor_state, world, pos, moved)
+            .with(SHAPE, getPlacementShape(this, state.get(FACING), world, pos));
+    }
+
+
+    @Nullable
+    @Override
+    public BlockState getPlacementState(ItemPlacementContext ctx) {
+        return getPlacement(super.getPlacementState(ctx), ctx);
+    }
+
+    @Override
+    public void onStateReplaced(BlockState state, World world, BlockPos pos, BlockState newState, boolean moved) {
+        super.onStateReplaced(state, world, pos, newState, moved);
+
+        if(!state.isOf(newState.getBlock())) world.removeBlockEntity(pos);
+    }
+
+    @Override
+    public VoxelShape getShape(BlockState state, int i) {
+        return i == 2 ? getComplementOutline(state) : getOutline(state);
+    }
+
+    private VoxelShape getComplementOutline(BlockState state) {
+        StairShape shape = state.get(SHAPE);
+        StairDirection direction = state.get(FACING);
+        return switch (shape) {
+            case STRAIGHT ->
+                switch (direction) {
+                    case DOWN_SOUTH ->                        COMPLEMENT_LIST.get(0);
+                    case NORTH_DOWN ->                        COMPLEMENT_LIST.get(1);
+                    case UP_NORTH ->                          COMPLEMENT_LIST.get(2);
+                    case SOUTH_UP ->                          COMPLEMENT_LIST.get(3);
+                    case DOWN_EAST ->                         COMPLEMENT_LIST.get(4);
+                    case WEST_DOWN ->                         COMPLEMENT_LIST.get(5);
+                    case UP_WEST ->                           COMPLEMENT_LIST.get(6);
+                    case EAST_UP ->                           COMPLEMENT_LIST.get(7);
+                    case NORTH_EAST ->                        COMPLEMENT_LIST.get(8);
+                    case EAST_SOUTH ->                        COMPLEMENT_LIST.get(9);
+                    case SOUTH_WEST ->                        COMPLEMENT_LIST.get(10);
+                    case WEST_NORTH ->                        COMPLEMENT_LIST.get(11);
+                };
+            case INNER_LEFT ->
+                switch (direction) {
+                    case WEST_DOWN, NORTH_DOWN ->             COMPLEMENT_LIST.get(44);
+                    case DOWN_EAST ->                         COMPLEMENT_LIST.get(45);
+                    case DOWN_SOUTH ->                        COMPLEMENT_LIST.get(47);
+                    case UP_WEST, UP_NORTH, WEST_NORTH ->     COMPLEMENT_LIST.get(48);
+                    case EAST_UP, NORTH_EAST ->               COMPLEMENT_LIST.get(49);
+                    case EAST_SOUTH ->                        COMPLEMENT_LIST.get(50);
+                    case SOUTH_UP, SOUTH_WEST ->              COMPLEMENT_LIST.get(51);
+                };
+            case INNER_RIGHT ->
+                switch (direction) {
+                    case WEST_NORTH ->                        COMPLEMENT_LIST.get(44);
+                    case NORTH_DOWN, NORTH_EAST ->            COMPLEMENT_LIST.get(45);
+                    case DOWN_EAST, DOWN_SOUTH, EAST_SOUTH -> COMPLEMENT_LIST.get(46);
+                    case WEST_DOWN, SOUTH_WEST ->             COMPLEMENT_LIST.get(47);
+                    case UP_NORTH ->                          COMPLEMENT_LIST.get(49);
+                    case EAST_UP, SOUTH_UP ->                 COMPLEMENT_LIST.get(50);
+                    case UP_WEST ->                           COMPLEMENT_LIST.get(51);
+                };
+            case OUTER_LEFT ->
+                switch (direction) {
+                    case DOWN_EAST ->                         COMPLEMENT_LIST.get(43);
+                    case WEST_DOWN, NORTH_DOWN ->             COMPLEMENT_LIST.get(42);
+                    case DOWN_SOUTH ->                        COMPLEMENT_LIST.get(41);
+                    case EAST_UP, NORTH_EAST ->               COMPLEMENT_LIST.get(39);
+                    case UP_WEST, UP_NORTH, WEST_NORTH ->     COMPLEMENT_LIST.get(38);
+                    case SOUTH_UP, SOUTH_WEST ->              COMPLEMENT_LIST.get(37);
+                    case EAST_SOUTH ->                        COMPLEMENT_LIST.get(36);
+                };
+            case OUTER_RIGHT ->
+                switch (direction) {
+                    case NORTH_DOWN, NORTH_EAST ->            COMPLEMENT_LIST.get(43);
+                    case WEST_NORTH ->                        COMPLEMENT_LIST.get(42);
+                    case WEST_DOWN, SOUTH_WEST ->             COMPLEMENT_LIST.get(41);
+                    case DOWN_EAST, DOWN_SOUTH, EAST_SOUTH -> COMPLEMENT_LIST.get(40);
+                    case UP_NORTH ->                          COMPLEMENT_LIST.get(39);
+                    case UP_WEST ->                           COMPLEMENT_LIST.get(37);
+                    case EAST_UP, SOUTH_UP ->                 COMPLEMENT_LIST.get(36);
+                };
+            case FIRST_OUTER_LEFT ->
+                switch (direction) {
+                    case WEST_DOWN, NORTH_DOWN ->             COMPLEMENT_LIST.get(14);
+                    case SOUTH_UP ->                          COMPLEMENT_LIST.get(17);
+                    case EAST_UP ->                           COMPLEMENT_LIST.get(19);
+                    case EAST_SOUTH ->                        COMPLEMENT_LIST.get(20);
+                    case DOWN_SOUTH ->                        COMPLEMENT_LIST.get(22);
+                    case UP_NORTH, WEST_NORTH ->              COMPLEMENT_LIST.get(25);
+                    case SOUTH_WEST ->                        COMPLEMENT_LIST.get(28);
+                    case UP_WEST ->                           COMPLEMENT_LIST.get(31);
+                    case DOWN_EAST ->                         COMPLEMENT_LIST.get(34);
+                    case NORTH_EAST ->                        COMPLEMENT_LIST.get(35);
+                };
+            case FIRST_OUTER_RIGHT ->
+                switch (direction) {
+                    case NORTH_DOWN ->                        COMPLEMENT_LIST.get(15);
+                    case SOUTH_UP, EAST_UP ->                 COMPLEMENT_LIST.get(16);
+                    case WEST_DOWN ->                         COMPLEMENT_LIST.get(13);
+                    case DOWN_SOUTH, EAST_SOUTH ->            COMPLEMENT_LIST.get(23);
+                    case UP_NORTH ->                          COMPLEMENT_LIST.get(24);
+                    case WEST_NORTH ->                        COMPLEMENT_LIST.get(26);
+                    case UP_WEST ->                           COMPLEMENT_LIST.get(28);
+                    case SOUTH_WEST ->                        COMPLEMENT_LIST.get(29);
+                    case DOWN_EAST ->                         COMPLEMENT_LIST.get(33);
+                    case NORTH_EAST ->                        COMPLEMENT_LIST.get(34);
+                };
+            case SECOND_OUTER_LEFT ->
+                switch (direction) {
+                    case DOWN_EAST ->                         COMPLEMENT_LIST.get(15);
+                    case DOWN_SOUTH ->                        COMPLEMENT_LIST.get(13);
+                    case UP_WEST, UP_NORTH ->                 COMPLEMENT_LIST.get(18);
+                    case SOUTH_UP, SOUTH_WEST ->              COMPLEMENT_LIST.get(21);
+                    case NORTH_EAST ->                        COMPLEMENT_LIST.get(24);
+                    case NORTH_DOWN ->                        COMPLEMENT_LIST.get(26);
+                    case WEST_DOWN ->                         COMPLEMENT_LIST.get(30);
+                    case WEST_NORTH ->                        COMPLEMENT_LIST.get(31);
+                    case EAST_SOUTH ->                        COMPLEMENT_LIST.get(32);
+                    case EAST_UP ->                           COMPLEMENT_LIST.get(35);
+                };
+            case SECOND_OUTER_RIGHT ->
+                switch (direction) {
+                    case DOWN_SOUTH, DOWN_EAST ->             COMPLEMENT_LIST.get(12);
+                    case UP_WEST ->                           COMPLEMENT_LIST.get(17);
+                    case UP_NORTH ->                          COMPLEMENT_LIST.get(19);
+                    case SOUTH_UP ->                          COMPLEMENT_LIST.get(20);
+                    case SOUTH_WEST ->                        COMPLEMENT_LIST.get(22);
+                    case NORTH_EAST, NORTH_DOWN ->            COMPLEMENT_LIST.get(27);
+                    case WEST_DOWN ->                         COMPLEMENT_LIST.get(29);
+                    case WEST_NORTH ->                        COMPLEMENT_LIST.get(30);
+                    case EAST_UP ->                           COMPLEMENT_LIST.get(32);
+                    case EAST_SOUTH ->                        COMPLEMENT_LIST.get(33);
+                };
+        };
+    }
+
+    @Override
+    public MultipartBlockStateSupplier getMultipart() {
+        return getStairMultipart(this, true);
+    }
+
+    static {
+        VOXEL_LIST.forEach(shape -> COMPLEMENT_LIST.add(VoxelShapes.combineAndSimplify(VoxelShapes.fullCube(), shape, BooleanBiFunction.ONLY_FIRST)));
+    }
+}

src/main/java/fr/adrien1106/reframed/block/ReFramedEntity.java

@@ -1,7 +1,6 @@
 package fr.adrien1106.reframed.block;
 
 import fr.adrien1106.reframed.ReFramed;
-import fr.adrien1106.reframed.util.ReFramedInteractionUtil;
 import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.minecraft.block.BlockState;
 import net.minecraft.block.Blocks;
@@ -21,25 +20,21 @@ import net.minecraft.util.math.BlockPos;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Objects;
 
 //Keeping the weight of this block entity down, both in terms of memory consumption and NBT sync traffic,
 //is pretty important since players might place a lot of them. There were tons and tons of these at Blanketcon.
 //To that end, most of the state has been crammed into a bitfield.
 public class ReFramedEntity extends BlockEntity implements ThemeableBlockEntity {
-	protected BlockState renderedState = Blocks.AIR.getDefaultState();
-	protected byte bitfield = DEFAULT_BITFIELD;
+	protected BlockState first_state = Blocks.AIR.getDefaultState();
+	protected byte bit_field = SOLIDITY_MASK;
 	
-	protected static final int SPENT_GLOWSTONE_DUST_MASK = 0b00000001;
-	protected static final int SPENT_REDSTONE_TORCH_MASK = 0b00000010;
-	protected static final int SPENT_POPPED_CHORUS_MASK  = 0b00000100;
-	protected static final int EMITS_REDSTONE_MASK       = 0b00001000;
-	protected static final int IS_SOLID_MASK             = 0b00010000;
-	protected static final byte DEFAULT_BITFIELD = IS_SOLID_MASK; //brand-new frames shall be solid
-	
-	//Using one-character names is a little brash, like, what if there's a mod that adds crap to the NBT of every
-	//block entity, and uses short names for the same reason I am (because there are lots and lots of block entities)?
-	//Kinda doubt it?
+	protected static final byte LIGHT_MASK    = 0b001;
+	protected static final byte REDSTONE_MASK = 0b010;
+	protected static final byte SOLIDITY_MASK = 0b100;
+
 	protected static final String BLOCKSTATE_KEY = "s";
 	protected static final String BITFIELD_KEY = "b";
 	
@@ -48,145 +43,116 @@ public class ReFramedEntity extends BlockEntity implements ThemeableBlockEntity
 	}
 	
 	@Override
-	public void readNbt(NbtCompound tag) {
-		super.readNbt(tag);
+	public void readNbt(NbtCompound nbt) {
+		super.readNbt(nbt);
 		
-		BlockState lastRenderedState = renderedState;
+		BlockState rendered_state = first_state; // keep previous state to check if rerender is needed
+		first_state = NbtHelper.toBlockState(Registries.BLOCK.getReadOnlyWrapper(), nbt.getCompound(BLOCKSTATE_KEY + 1));
+		if (nbt.contains(BITFIELD_KEY)) bit_field = nbt.getByte(BITFIELD_KEY);
 		
-		if(tag.contains("BlockState")) { //2.0.4 and earlier
-			renderedState = NbtHelper.toBlockState(Registries.BLOCK.getReadOnlyWrapper(), tag.getCompound("BlockState"));
-			
-			if(tag.getBoolean("spentglow")) spentGlowstoneDust();
-			if(tag.getBoolean("spentredst")) spentRedstoneTorch();
-			if(tag.getBoolean("spentchor")) spentPoppedChorus();
-			setEmitsRedstone(tag.getBoolean("emitsredst"));
-			setSolidity(!tag.contains("solid") || tag.getBoolean("solid")); //default to "true" if it's nonexistent
-		} else {
-			renderedState = NbtHelper.toBlockState(Registries.BLOCK.getReadOnlyWrapper(), tag.getCompound(BLOCKSTATE_KEY));
-			bitfield = tag.contains(BITFIELD_KEY) ? tag.getByte(BITFIELD_KEY) : DEFAULT_BITFIELD;
-		}
-		
-		//Force a chunk remesh on the client if the displayed blockstate has changed
-		if(world != null && world.isClient && !Objects.equals(lastRenderedState, renderedState)) {
+		// Force a chunk remesh on the client if the displayed blockstate has changed
+		if(world != null && world.isClient && !Objects.equals(rendered_state, first_state)) {
 			ReFramed.chunkRerenderProxy.accept(world, pos);
 		}
 	}
 	
 	@Override
-	public void writeNbt(NbtCompound tag) {
-		super.writeNbt(tag);
+	public void writeNbt(NbtCompound nbt) {
+		super.writeNbt(nbt);
 		
-		if(renderedState != Blocks.AIR.getDefaultState()) tag.put(BLOCKSTATE_KEY, NbtHelper.fromBlockState(renderedState));
-		if(bitfield != DEFAULT_BITFIELD) tag.putByte(BITFIELD_KEY, bitfield);
+		if(first_state != Blocks.AIR.getDefaultState()) nbt.put(BLOCKSTATE_KEY + 1, NbtHelper.fromBlockState(first_state));
+		if(bit_field != SOLIDITY_MASK) nbt.putByte(BITFIELD_KEY, bit_field);
 	}
-	
-	public static @NotNull BlockState readStateFromItem(ItemStack stack) {
-		NbtCompound blockEntityTag = BlockItem.getBlockEntityNbt(stack);
-		if(blockEntityTag == null) return Blocks.AIR.getDefaultState();
+
+	public static @NotNull BlockState readStateFromItem(ItemStack stack, int state) {
+		NbtCompound nbt = BlockItem.getBlockEntityNbt(stack);
+		if(nbt == null) return Blocks.AIR.getDefaultState();
 		
 		//slightly paranoid NBT handling cause you never know what mysteries are afoot with items
-		NbtElement subElement;
-		if(blockEntityTag.contains(BLOCKSTATE_KEY)) subElement = blockEntityTag.get(BLOCKSTATE_KEY); //2.0.5
-		else if(blockEntityTag.contains("BlockState")) subElement = blockEntityTag.get("BlockState"); //old 2.0.4 items
+		NbtElement element;
+		if(nbt.contains(BLOCKSTATE_KEY + state)) element = nbt.get(BLOCKSTATE_KEY + state);
 		else return Blocks.AIR.getDefaultState();
 		
-		if(!(subElement instanceof NbtCompound subCompound)) return Blocks.AIR.getDefaultState();
-		
-		else return NbtHelper.toBlockState(Registries.BLOCK.getReadOnlyWrapper(), subCompound);
+		if(!(element instanceof NbtCompound compound)) return Blocks.AIR.getDefaultState();
+		else return NbtHelper.toBlockState(Registries.BLOCK.getReadOnlyWrapper(), compound);
 	}
 	
 	//Awkward: usually the BlockState is the source of truth for things like the "emits light" blockstate, but if you
 	//ctrl-pick a glowing block and place it, it should still be glowing. This is some hacky shit that guesses the value of
 	//the LIGHT blockstate based off information in the NBT tag, and also prevents bugginess like "the blockstate is not
 	//glowing but the copied NBT thinks glowstone dust was already added, so it refuses to accept more dust"
-	public static @Nullable BlockState weirdNbtLightLevelStuff(@Nullable BlockState state, ItemStack stack) {
+	public static @Nullable BlockState getNbtLightLevel(@Nullable BlockState state, ItemStack stack) {
 		if(state == null || stack == null) return state;
 		
-		NbtCompound blockEntityTag = BlockItem.getBlockEntityNbt(stack);
-		if(blockEntityTag == null) return state;
+		NbtCompound nbt = BlockItem.getBlockEntityNbt(stack);
+		if(nbt == null) return state;
 		
-		if(state.contains(ReFramedInteractionUtil.LIGHT)) {
-			state = state.with(ReFramedInteractionUtil.LIGHT,
-				blockEntityTag.getBoolean("spentglow") || //2.0.4
-				((blockEntityTag.contains(BITFIELD_KEY) ? blockEntityTag.getByte(BITFIELD_KEY) : DEFAULT_BITFIELD) & SPENT_GLOWSTONE_DUST_MASK) != 0 || //2.0.5
-				readStateFromItem(stack).getLuminance() != 0 //glowstone dust wasn't manually added, the block just emits light
+		if(state.contains(ReFramedBlock.LIGHT)) {
+			state = state.with(ReFramedBlock.LIGHT,
+				((nbt.contains(BITFIELD_KEY)
+					? nbt.getByte(BITFIELD_KEY)
+					: SOLIDITY_MASK)
+					& LIGHT_MASK) != 0
 			);
 		}
 		
 		return state;
 	}
-	
-	//RenderAttachmentBlockEntity impl. Note that ThemeableBlockEntity depends on this returning a BlockState object.
+
 	@Override
-	public BlockState getRenderAttachmentData() {
-		return renderedState;
+	public BlockState getTheme(int i) {
+		return first_state;
 	}
-	
-	public void setRenderedState(BlockState newState) {
-		if(!Objects.equals(renderedState, newState)) {
-			renderedState = newState;
+
+	@Override
+	public List<BlockState> getThemes() {
+		List<BlockState> themes = new ArrayList<>();
+		themes.add(first_state);
+		return themes;
+	}
+
+	public void setTheme(BlockState new_state, int i) {
+		if(!Objects.equals(first_state, new_state)) {
+			first_state = new_state;
 			markDirtyAndDispatch();
 		}
 	}
-	
-	public boolean hasSpentGlowstoneDust() {
-		return (bitfield & SPENT_GLOWSTONE_DUST_MASK) != 0;
+
+	/* --------------------------------------------------- ADDONS --------------------------------------------------- */
+	public boolean emitsLight() {
+		return (bit_field & LIGHT_MASK) != 0;
 	}
 	
-	public void spentGlowstoneDust() {
-		bitfield |= SPENT_GLOWSTONE_DUST_MASK;
+	public void toggleLight() {
+		if (emitsLight()) bit_field &= ~LIGHT_MASK;
+		else bit_field |= LIGHT_MASK;
 		markDirtyAndDispatch();
 	}
 	
-	public boolean hasSpentRedstoneTorch() {
-		return (bitfield & SPENT_REDSTONE_TORCH_MASK) != 0;
-	}
-	
-	public void spentRedstoneTorch() {
-		bitfield |= SPENT_REDSTONE_TORCH_MASK;
+	public void toggleRedstone() {
+		if (emitsRedstone()) bit_field &= ~REDSTONE_MASK;
+		else bit_field |= REDSTONE_MASK;
+
+		if(world != null) world.updateNeighbors(pos, getCachedState().getBlock());
 		markDirtyAndDispatch();
 	}
-	
-	public boolean hasSpentPoppedChorus() {
-		return (bitfield & SPENT_POPPED_CHORUS_MASK) != 0;
-	}
-	
-	public void spentPoppedChorus() {
-		bitfield |= SPENT_POPPED_CHORUS_MASK;
-		markDirtyAndDispatch();
-	}
-	
+
 	public boolean emitsRedstone() {
-		return (bitfield & EMITS_REDSTONE_MASK) != 0;
+		return (bit_field & REDSTONE_MASK) != 0;
 	}
 	
-	public void setEmitsRedstone(boolean nextEmitsRedstone) {
-		boolean currentlyEmitsRedstone = emitsRedstone();
-		
-		if(currentlyEmitsRedstone != nextEmitsRedstone) {
-			if(currentlyEmitsRedstone) bitfield &= ~EMITS_REDSTONE_MASK;
-			else bitfield |= EMITS_REDSTONE_MASK;
-			markDirtyAndDispatch();
-			if(world != null) world.updateNeighbors(pos, getCachedState().getBlock());
-		}
+	public void toggleSolidity() {
+		if (isSolid()) bit_field &= ~SOLIDITY_MASK;
+		else bit_field |= SOLIDITY_MASK;
+
+		if(world != null) world.setBlockState(pos, getCachedState());
+		markDirtyAndDispatch();
 	}
 	
 	public boolean isSolid() {
-		return (bitfield & IS_SOLID_MASK) != 0;
+		return (bit_field & SOLIDITY_MASK) != 0;
 	}
-	
-	public void setSolidity(boolean nextSolid) {
-		boolean currentlySolid = isSolid();
-		
-		if(currentlySolid != nextSolid) {
-			if(currentlySolid) bitfield &= ~IS_SOLID_MASK;
-			else bitfield |= IS_SOLID_MASK;
-			markDirtyAndDispatch();
-			if(world != null) world.setBlockState(pos, getCachedState()); //do i need to invalidate any shape caches or something
-		}
-	}
-	
-	//<standard blockentity boilerplate>
+
 	@Nullable
 	@Override
 	public Packet<ClientPlayPacketListener> toUpdatePacket() {
@@ -195,8 +161,6 @@ public class ReFramedEntity extends BlockEntity implements ThemeableBlockEntity
 	
 	@Override
 	public NbtCompound toInitialChunkDataNbt() {
-		//TERRIBLE yarn name, this is "getUpdateTag", it's the nbt that will be sent to clients
-		//and it just calls "writeNbt"
 		return createNbt();
 	}
 	
@@ -208,5 +172,4 @@ public class ReFramedEntity extends BlockEntity implements ThemeableBlockEntity
 		markDirty();
 		dispatch();
 	}
-	//</standard blockentity boilerplate>
 }

src/main/java/fr/adrien1106/reframed/block/ReFramedSlabBlock.java

@@ -1,11 +1,15 @@
 package fr.adrien1106.reframed.block;
 
+import fr.adrien1106.reframed.ReFramed;
+import fr.adrien1106.reframed.generator.GBlockstate;
 import fr.adrien1106.reframed.generator.MultipartBlockStateProvider;
-import net.minecraft.block.*;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.ShapeContext;
 import net.minecraft.data.client.MultipartBlockStateSupplier;
 import net.minecraft.item.ItemPlacementContext;
 import net.minecraft.state.StateManager;
-import net.minecraft.state.property.Properties;
+import net.minecraft.util.Identifier;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Direction;
 import net.minecraft.util.shape.VoxelShape;
@@ -13,34 +17,37 @@ import net.minecraft.util.shape.VoxelShapes;
 import net.minecraft.world.BlockView;
 import org.jetbrains.annotations.Nullable;
 
+import static net.minecraft.data.client.VariantSettings.Rotation.*;
+import static net.minecraft.state.property.Properties.FACING;
+
 public class ReFramedSlabBlock extends WaterloggableReFramedBlock implements MultipartBlockStateProvider {
 
-	private static final VoxelShape DOWN = VoxelShapes.cuboid(0f, 0f, 0f, 1f, 0.5f, 1f);
-	private static final VoxelShape UP = VoxelShapes.cuboid(0f, 0.5f, 0f, 1f, 1f, 1f);
-	private static final VoxelShape NORTH = VoxelShapes.cuboid(0f, 0f, 0f, 1f, 1f, 0.5f);
-	private static final VoxelShape SOUTH = VoxelShapes.cuboid(0f, 0f, 0.5f, 1f, 1f, 1f);
-	private static final VoxelShape EAST = VoxelShapes.cuboid(0.5f, 0f, 0f, 1f, 1f, 1f);
-	private static final VoxelShape WEST = VoxelShapes.cuboid(0f, 0f, 0f, 0.5f, 1f, 1f);
+	protected static final VoxelShape DOWN = VoxelShapes.cuboid(0f, 0f, 0f, 1f, 0.5f, 1f);
+	protected static final VoxelShape UP = VoxelShapes.cuboid(0f, 0.5f, 0f, 1f, 1f, 1f);
+	protected static final VoxelShape NORTH = VoxelShapes.cuboid(0f, 0f, 0f, 1f, 1f, 0.5f);
+	protected static final VoxelShape SOUTH = VoxelShapes.cuboid(0f, 0f, 0.5f, 1f, 1f, 1f);
+	protected static final VoxelShape EAST = VoxelShapes.cuboid(0.5f, 0f, 0f, 1f, 1f, 1f);
+	protected static final VoxelShape WEST = VoxelShapes.cuboid(0f, 0f, 0f, 0.5f, 1f, 1f);
 
 	public ReFramedSlabBlock(Settings settings) {
 		super(settings);
-		setDefaultState(getDefaultState().with(Properties.FACING, Direction.DOWN));
+		setDefaultState(getDefaultState().with(FACING, Direction.DOWN));
 	}
 	
 	@Override
 	protected void appendProperties(StateManager.Builder<Block, BlockState> builder) {
-		super.appendProperties(builder.add(Properties.FACING));
+		super.appendProperties(builder.add(FACING));
 	}
 	
 	@Nullable
 	@Override
 	public BlockState getPlacementState(ItemPlacementContext ctx) {
-		return super.getPlacementState(ctx).with(Properties.FACING, ctx.getSide().getOpposite());
+		return super.getPlacementState(ctx).with(FACING, ctx.getSide().getOpposite());
 	}
 
 	@Override
 	public VoxelShape getOutlineShape(BlockState state, BlockView world, BlockPos pos, ShapeContext context) {
-		return switch (state.get(Properties.FACING)) {
+		return switch (state.get(FACING)) {
 			case DOWN -> DOWN;
 			case UP -> UP;
 			case NORTH -> NORTH;
@@ -52,6 +59,19 @@ public class ReFramedSlabBlock extends WaterloggableReFramedBlock implements Mul
 
 	@Override
 	public MultipartBlockStateSupplier getMultipart() {
-		return null;
+		Identifier model_id = ReFramed.id("slab_special");
+		return MultipartBlockStateSupplier.create(this)
+			.with(GBlockstate.when(FACING, Direction.DOWN),
+				GBlockstate.variant(model_id, true, R0, R0))
+			.with(GBlockstate.when(FACING, Direction.SOUTH),
+				GBlockstate.variant(model_id, true, R90, R0))
+			.with(GBlockstate.when(FACING, Direction.UP),
+				GBlockstate.variant(model_id, true, R180, R0))
+			.with(GBlockstate.when(FACING, Direction.NORTH),
+				GBlockstate.variant(model_id, true, R270, R0))
+			.with(GBlockstate.when(FACING, Direction.WEST),
+				GBlockstate.variant(model_id, true, R90, R90))
+			.with(GBlockstate.when(FACING, Direction.EAST),
+				GBlockstate.variant(model_id, true, R90, R270));
 	}
 }

src/main/java/fr/adrien1106/reframed/block/ReFramedStairsBlock.java

@@ -38,7 +38,7 @@ public class ReFramedStairsBlock extends WaterloggableReFramedBlock implements M
 
 	public static final EnumProperty<StairDirection> FACING = EnumProperty.of("facing", StairDirection.class);
 	public static final EnumProperty<StairShape> SHAPE = EnumProperty.of("shape", StairShape.class);
-	private static final List<VoxelShape> VOXEL_LIST = new ArrayList<>(52);
+	public static final List<VoxelShape> VOXEL_LIST = new ArrayList<>(52);
 
 	public ReFramedStairsBlock(Settings settings) {
 		super(settings);
@@ -53,13 +53,16 @@ public class ReFramedStairsBlock extends WaterloggableReFramedBlock implements M
 	@Override
 	public BlockState getStateForNeighborUpdate(BlockState state, Direction direction, BlockState neighbor_state, WorldAccess world, BlockPos pos, BlockPos moved) {
 		return super.getStateForNeighborUpdate(state, direction, neighbor_state, world, pos, moved)
-			.with(SHAPE, getPlacementShape(state.get(FACING), world, pos));
+			.with(SHAPE, getPlacementShape(state.getBlock(), state.get(FACING), world, pos));
 	}
 
 	@Nullable
 	@Override // Pretty happy of how clean it is (also got it on first try :) )
 	public BlockState getPlacementState(ItemPlacementContext ctx) {
-		BlockState state = super.getPlacementState(ctx);
+		return getPlacement(super.getPlacementState(ctx), ctx);
+	}
+
+	public static BlockState getPlacement(BlockState state, ItemPlacementContext ctx) {
 		Direction side = ctx.getSide().getOpposite();
 		BlockPos block_pos = ctx.getBlockPos();
 		Vec3d hit_pos = ctx.getHitPos();
@@ -84,20 +87,23 @@ public class ReFramedStairsBlock extends WaterloggableReFramedBlock implements M
 		);
 		StairDirection face = StairDirection.getByDirections(side, part_direction);
 
-		return state.with(FACING, face).with(SHAPE, getPlacementShape(face, ctx.getWorld(), block_pos));
+		return state.with(FACING, face).with(SHAPE, getPlacementShape(state.getBlock(), face, ctx.getWorld(), block_pos));
 	}
 
 	@Override
 	public void onStateReplaced(BlockState state, World world, BlockPos pos, BlockState newState, boolean moved) {
 		super.onStateReplaced(state, world, pos, newState, moved);
 
-		//StairsBlock onStateReplaced is Weird! it doesn't delegate to regular block onStateReplaced!
 		if(!state.isOf(newState.getBlock())) world.removeBlockEntity(pos);
 	}
 
 	/* ---------------------------------- DON'T GO FURTHER IF YOU LIKE HAVING EYES ---------------------------------- */
 	@Override
 	public VoxelShape getOutlineShape(BlockState state, BlockView world, BlockPos pos, ShapeContext context) {
+		return getOutline(state);
+	}
+
+	public static VoxelShape getOutline(BlockState state) {
 		StairShape shape = state.get(SHAPE);
 		StairDirection direction = state.get(FACING);
 		return switch (shape) {
@@ -211,40 +217,40 @@ public class ReFramedStairsBlock extends WaterloggableReFramedBlock implements M
 		};
 	}
 
-	private static String getNeighborPos(StairDirection face, Direction direction, Boolean reverse, Direction reference, BlockView world, BlockPos pos) {
+	public static String getNeighborPos(StairDirection face, Direction direction, Boolean reverse, Direction reference, BlockView world, BlockPos pos, Block block) {
 		BlockState block_state = world.getBlockState(
 			pos.offset(reverse ? direction.getOpposite() : direction)
 		);
 
-		if (block_state.getBlock() instanceof ReFramedStairsBlock && block_state.get(FACING).hasDirection(reference)) {
+		if (block_state.isOf(block) && block_state.get(FACING).hasDirection(reference)) {
 			if (block_state.get(FACING).hasDirection(face.getLeftDirection())) return "left";
 			else if (block_state.get(FACING).hasDirection(face.getRightDirection())) return "right";
 		}
 		return "";
 	}
 
-	private static StairShape getPlacementShape(StairDirection face, BlockView world, BlockPos pos) {
+	public static StairShape getPlacementShape(Block block, StairDirection face, BlockView world, BlockPos pos) {
 		StairShape shape = STRAIGHT;
 
-		String sol = getNeighborPos(face, face.getFirstDirection(), true, face.getSecondDirection(), world, pos);
+		String sol = getNeighborPos(face, face.getFirstDirection(), true, face.getSecondDirection(), world, pos, block);
 		switch (sol) {
 			case "right": return INNER_RIGHT;
 			case "left": return INNER_LEFT;
 		}
 
-		sol = getNeighborPos(face, face.getSecondDirection(), true, face.getFirstDirection(), world, pos);
+		sol = getNeighborPos(face, face.getSecondDirection(), true, face.getFirstDirection(), world, pos, block);
 		switch (sol) {
 			case "right": return INNER_RIGHT;
 			case "left": return INNER_LEFT;
 		}
 
-		sol = getNeighborPos(face, face.getFirstDirection(), false, face.getSecondDirection(), world, pos);
+		sol = getNeighborPos(face, face.getFirstDirection(), false, face.getSecondDirection(), world, pos, block);
 		switch (sol) {
 			case "right" -> shape = FIRST_OUTER_RIGHT;
 			case "left" -> shape = FIRST_OUTER_LEFT;
 		}
 
-		sol = getNeighborPos(face, face.getSecondDirection(), false, face.getFirstDirection(), world, pos);
+		sol = getNeighborPos(face, face.getSecondDirection(), false, face.getFirstDirection(), world, pos, block);
 		switch (sol) {
 			case "right" -> {
 				if (shape.equals(STRAIGHT)) shape = SECOND_OUTER_RIGHT;
@@ -261,12 +267,17 @@ public class ReFramedStairsBlock extends WaterloggableReFramedBlock implements M
 
 	@Override
 	public MultipartBlockStateSupplier getMultipart() {
-		Identifier straight_id = ReFramed.id("stairs_special");
-		Identifier double_outer_id = ReFramed.id("double_outer_stairs_special");
-		Identifier inner_id = ReFramed.id("inner_stairs_special");
-		Identifier outer_id = ReFramed.id("outer_stairs_special");
-		Identifier outer_side_id = ReFramed.id("outer_side_stairs_special");
-		return MultipartBlockStateSupplier.create(this)
+		return getStairMultipart(this, false);
+	}
+
+	public static MultipartBlockStateSupplier getStairMultipart(Block block, boolean is_double) {
+		String prefix = is_double ? "double_" : "";
+		Identifier straight_id = ReFramed.id(prefix + "stairs_special");
+		Identifier double_outer_id = ReFramed.id(prefix + "outers_stairs_special");
+		Identifier inner_id = ReFramed.id(prefix + "inner_stairs_special");
+		Identifier outer_id = ReFramed.id(prefix + "outer_stairs_special");
+		Identifier outer_side_id = ReFramed.id(prefix + "outer_side_stairs_special");
+		return MultipartBlockStateSupplier.create(block)
 			/* STRAIGHT X AXIS */
 			.with(GBlockstate.when(FACING, DOWN_EAST, SHAPE, STRAIGHT),
 				GBlockstate.variant(straight_id, true, R0, R0))

src/main/java/fr/adrien1106/reframed/block/WaterloggableReFramedBlock.java

@@ -16,7 +16,6 @@ import org.jetbrains.annotations.Nullable;
 public class WaterloggableReFramedBlock extends ReFramedBlock implements Waterloggable {
 	public WaterloggableReFramedBlock(Settings settings) {
 		super(settings);
-		
 		setDefaultState(getDefaultState().with(Properties.WATERLOGGED, false));
 	}
 	

src/main/java/fr/adrien1106/reframed/client/ReFramedClient.java

@@ -26,72 +26,80 @@ public class ReFramedClient implements ClientModInitializer {
 		//all frames mustn't be on the SOLID layer because they are not opaque!
 		BlockRenderLayerMap.INSTANCE.putBlocks(RenderLayer.getCutout(), ReFramed.BLOCKS.toArray(new Block[0]));
 		
-		HELPER.addReFramedModel(ReFramed.id("button_special")               , HELPER.auto(new Identifier("block/button")));
-		HELPER.addReFramedModel(ReFramed.id("button_pressed_special")       , HELPER.auto(new Identifier("block/button_pressed")));
-		HELPER.addReFramedModel(ReFramed.id("one_candle_special")           , HELPER.auto(new Identifier("block/template_candle")));
-		HELPER.addReFramedModel(ReFramed.id("two_candles_special")          , HELPER.auto(new Identifier("block/template_two_candles")));
-		HELPER.addReFramedModel(ReFramed.id("three_candles_special")        , HELPER.auto(new Identifier("block/template_three_candles")));
-		HELPER.addReFramedModel(ReFramed.id("four_candles_special")         , HELPER.auto(new Identifier("block/template_four_candles")));
-		HELPER.addReFramedModel(ReFramed.id("carpet_special")               , HELPER.auto(new Identifier("block/carpet")));
-		HELPER.addReFramedModel(ReFramed.id("cube_special")                 , HELPER.auto(new Identifier("block/cube")));
-		HELPER.addReFramedModel(ReFramed.id("door_bottom_left_special")     , HELPER.auto(new Identifier("block/door_bottom_left")));
-		HELPER.addReFramedModel(ReFramed.id("door_bottom_right_special")    , HELPER.auto(new Identifier("block/door_bottom_right")));
-		HELPER.addReFramedModel(ReFramed.id("door_top_left_special")        , HELPER.auto(new Identifier("block/door_top_left")));
-		HELPER.addReFramedModel(ReFramed.id("door_top_right_special")       , HELPER.auto(new Identifier("block/door_top_right")));
-		HELPER.addReFramedModel(ReFramed.id("door_bottom_left_open_special"), HELPER.auto(new Identifier("block/door_bottom_left_open")));
-		HELPER.addReFramedModel(ReFramed.id("door_bottom_right_open_special"), HELPER.auto(new Identifier("block/door_bottom_right_open"))); //This is why we dont format code as tables kids
-		HELPER.addReFramedModel(ReFramed.id("door_top_left_open_special")   , HELPER.auto(new Identifier("block/door_top_left_open")));
-		HELPER.addReFramedModel(ReFramed.id("door_top_right_open_special")  , HELPER.auto(new Identifier("block/door_top_right_open")));
-		HELPER.addReFramedModel(ReFramed.id("fence_post_special")           , HELPER.auto(new Identifier("block/fence_post")));
-		HELPER.addReFramedModel(ReFramed.id("fence_gate_special")           , HELPER.auto(new Identifier("block/template_fence_gate")));
-		HELPER.addReFramedModel(ReFramed.id("fence_gate_open_special")      , HELPER.auto(new Identifier("block/template_fence_gate_open")));
-		HELPER.addReFramedModel(ReFramed.id("fence_gate_wall_special")      , HELPER.auto(new Identifier("block/template_fence_gate_wall")));
-		HELPER.addReFramedModel(ReFramed.id("fence_gate_wall_open_special") , HELPER.auto(new Identifier("block/template_fence_gate_wall_open")));
-		HELPER.addReFramedModel(ReFramed.id("glass_pane_post_special")      , HELPER.auto(new Identifier("block/glass_pane_post")));
-		HELPER.addReFramedModel(ReFramed.id("glass_pane_noside_special")    , HELPER.auto(new Identifier("block/glass_pane_noside")));
-		HELPER.addReFramedModel(ReFramed.id("glass_pane_noside_alt_special"), HELPER.auto(new Identifier("block/glass_pane_noside_alt")));
-		HELPER.addReFramedModel(ReFramed.id("pressure_plate_up_special")    , HELPER.auto(new Identifier("block/pressure_plate_up")));
-		HELPER.addReFramedModel(ReFramed.id("pressure_plate_down_special")  , HELPER.auto(new Identifier("block/pressure_plate_down")));
-		HELPER.addReFramedModel(ReFramed.id("slab_special")                 , HELPER.auto(new Identifier("block/slab")));
-		HELPER.addReFramedModel(ReFramed.id("stairs_special")               , HELPER.auto(ReFramed.id("block/stairs")));
-		HELPER.addReFramedModel(ReFramed.id("double_outer_stairs_special")  , HELPER.auto(ReFramed.id("block/double_outer_stairs")));
-		HELPER.addReFramedModel(ReFramed.id("inner_stairs_special")         , HELPER.auto(ReFramed.id("block/inner_stairs")));
-		HELPER.addReFramedModel(ReFramed.id("outer_stairs_special")         , HELPER.auto(ReFramed.id("block/outer_stairs")));
-		HELPER.addReFramedModel(ReFramed.id("outer_side_stairs_special")    , HELPER.auto(ReFramed.id("block/outer_side_stairs")));
-		HELPER.addReFramedModel(ReFramed.id("trapdoor_bottom_special")      , HELPER.auto(new Identifier("block/template_trapdoor_bottom")));
-		HELPER.addReFramedModel(ReFramed.id("trapdoor_top_special")         , HELPER.auto(new Identifier("block/template_trapdoor_top")));
-		HELPER.addReFramedModel(ReFramed.id("wall_post_special")            , HELPER.auto(new Identifier("block/template_wall_post")));
+		HELPER.addReFramedModel("button_special"                  , HELPER.auto(new Identifier("block/button")));
+		HELPER.addReFramedModel("button_pressed_special"          , HELPER.auto(new Identifier("block/button_pressed")));
+		HELPER.addReFramedModel("one_candle_special"              , HELPER.auto(new Identifier("block/template_candle")));
+		HELPER.addReFramedModel("two_candles_special"             , HELPER.auto(new Identifier("block/template_two_candles")));
+		HELPER.addReFramedModel("three_candles_special"           , HELPER.auto(new Identifier("block/template_three_candles")));
+		HELPER.addReFramedModel("four_candles_special"            , HELPER.auto(new Identifier("block/template_four_candles")));
+		HELPER.addReFramedModel("carpet_special"                  , HELPER.auto(new Identifier("block/carpet")));
+		HELPER.addReFramedModel("cube_special"                    , HELPER.auto(new Identifier("block/cube")));
+		HELPER.addReFramedModel("door_bottom_left_special"        , HELPER.auto(new Identifier("block/door_bottom_left")));
+		HELPER.addReFramedModel("door_bottom_right_special"       , HELPER.auto(new Identifier("block/door_bottom_right")));
+		HELPER.addReFramedModel("door_top_left_special"           , HELPER.auto(new Identifier("block/door_top_left")));
+		HELPER.addReFramedModel("door_top_right_special"          , HELPER.auto(new Identifier("block/door_top_right")));
+		HELPER.addReFramedModel("door_bottom_left_open_special"   , HELPER.auto(new Identifier("block/door_bottom_left_open")));
+		HELPER.addReFramedModel("door_bottom_right_open_special"  , HELPER.auto(new Identifier("block/door_bottom_right_open"))); //This is why we dont format code as tables kids
+		HELPER.addReFramedModel("door_top_left_open_special"      , HELPER.auto(new Identifier("block/door_top_left_open")));
+		HELPER.addReFramedModel("door_top_right_open_special"     , HELPER.auto(new Identifier("block/door_top_right_open")));
+		HELPER.addReFramedModel("fence_post_special"              , HELPER.auto(new Identifier("block/fence_post")));
+		HELPER.addReFramedModel("fence_gate_special"              , HELPER.auto(new Identifier("block/template_fence_gate")));
+		HELPER.addReFramedModel("fence_gate_open_special"         , HELPER.auto(new Identifier("block/template_fence_gate_open")));
+		HELPER.addReFramedModel("fence_gate_wall_special"         , HELPER.auto(new Identifier("block/template_fence_gate_wall")));
+		HELPER.addReFramedModel("fence_gate_wall_open_special"    , HELPER.auto(new Identifier("block/template_fence_gate_wall_open")));
+		HELPER.addReFramedModel("glass_pane_post_special"         , HELPER.auto(new Identifier("block/glass_pane_post")));
+		HELPER.addReFramedModel("glass_pane_noside_special"       , HELPER.auto(new Identifier("block/glass_pane_noside")));
+		HELPER.addReFramedModel("glass_pane_noside_alt_special"   , HELPER.auto(new Identifier("block/glass_pane_noside_alt")));
+		HELPER.addReFramedModel("pressure_plate_up_special"       , HELPER.auto(new Identifier("block/pressure_plate_up")));
+		HELPER.addReFramedModel("pressure_plate_down_special"     , HELPER.auto(new Identifier("block/pressure_plate_down")));
+		HELPER.addReFramedModel("slab_special"                    , HELPER.auto(new Identifier("block/slab")));
+		HELPER.addReFramedModel("double_slab_special"             , HELPER.autoDouble(new Identifier("block/slab"), new Identifier("block/slab_top")));
+		HELPER.addReFramedModel("stairs_special"                  , HELPER.auto(ReFramed.id("block/stairs")));
+		HELPER.addReFramedModel("outers_stairs_special"           , HELPER.auto(ReFramed.id("block/double_outer_stairs")));
+		HELPER.addReFramedModel("inner_stairs_special"            , HELPER.auto(ReFramed.id("block/inner_stairs")));
+		HELPER.addReFramedModel("outer_stairs_special"            , HELPER.auto(ReFramed.id("block/outer_stairs")));
+		HELPER.addReFramedModel("outer_side_stairs_special"       , HELPER.auto(ReFramed.id("block/outer_side_stairs")));
+		HELPER.addReFramedModel("double_stairs_special"           , HELPER.autoDouble(ReFramed.id("block/stairs"), ReFramed.id("block/stairs_complement")));
+		HELPER.addReFramedModel("double_outers_stairs_special"    , HELPER.autoDouble(ReFramed.id("block/double_outer_stairs"), ReFramed.id("block/double_outer_stairs_complement")));
+		HELPER.addReFramedModel("double_inner_stairs_special"     , HELPER.autoDouble(ReFramed.id("block/inner_stairs"), ReFramed.id("block/inner_stairs_complement")));
+		HELPER.addReFramedModel("double_outer_stairs_special"     , HELPER.autoDouble(ReFramed.id("block/outer_stairs"), ReFramed.id("block/outer_stairs_complement")));
+		HELPER.addReFramedModel("double_outer_side_stairs_special", HELPER.autoDouble(ReFramed.id("block/outer_side_stairs"), ReFramed.id("block/outer_side_stairs_complement")));
+		HELPER.addReFramedModel("trapdoor_bottom_special"         , HELPER.auto(new Identifier("block/template_trapdoor_bottom")));
+		HELPER.addReFramedModel("trapdoor_top_special"            , HELPER.auto(new Identifier("block/template_trapdoor_top")));
+		HELPER.addReFramedModel("wall_post_special"               , HELPER.auto(new Identifier("block/template_wall_post")));
 		
 		//vanilla style models (using "special-sprite replacement" method)
-		HELPER.addReFramedModel(ReFramed.id("lever_special")                , HELPER.json(ReFramed.id("block/lever")));
-		HELPER.addReFramedModel(ReFramed.id("trapdoor_open_special")        , HELPER.json(ReFramed.id("block/trapdoor_open")));
-		HELPER.addReFramedModel(ReFramed.id("lever_on_special")             , HELPER.json(ReFramed.id("block/lever_on")));
+		HELPER.addReFramedModel("lever_special"                , HELPER.json(ReFramed.id("block/lever")));
+		HELPER.addReFramedModel("trapdoor_open_special"        , HELPER.json(ReFramed.id("block/trapdoor_open")));
+		HELPER.addReFramedModel("lever_on_special"             , HELPER.json(ReFramed.id("block/lever_on")));
 		//these next five only exist because AutoRetexturedModels don't seem to rotate their textures the right way when rotated from a multipart blockstate
-		HELPER.addReFramedModel(ReFramed.id("fence_side_special")           , HELPER.json(ReFramed.id("block/fence_side")));
-		HELPER.addReFramedModel(ReFramed.id("glass_pane_side_special")      , HELPER.json(ReFramed.id("block/glass_pane_side")));
-		HELPER.addReFramedModel(ReFramed.id("glass_pane_side_alt_special")  , HELPER.json(ReFramed.id("block/glass_pane_side_alt")));
-		HELPER.addReFramedModel(ReFramed.id("wall_side_special")            , HELPER.json(ReFramed.id("block/wall_side")));
-		HELPER.addReFramedModel(ReFramed.id("wall_side_tall_special")       , HELPER.json(ReFramed.id("block/wall_side_tall")));
+		HELPER.addReFramedModel("fence_side_special"           , HELPER.json(ReFramed.id("block/fence_side")));
+		HELPER.addReFramedModel("glass_pane_side_special"      , HELPER.json(ReFramed.id("block/glass_pane_side")));
+		HELPER.addReFramedModel("glass_pane_side_alt_special"  , HELPER.json(ReFramed.id("block/glass_pane_side_alt")));
+		HELPER.addReFramedModel("wall_side_special"            , HELPER.json(ReFramed.id("block/wall_side")));
+		HELPER.addReFramedModel("wall_side_tall_special"       , HELPER.json(ReFramed.id("block/wall_side_tall")));
 		
 		//item only models
-		HELPER.addReFramedModel(ReFramed.id("button_inventory_special")     , HELPER.auto(new Identifier("block/button_inventory")));
-		HELPER.addReFramedModel(ReFramed.id("fence_inventory_special")      , HELPER.auto(new Identifier("block/fence_inventory")));
-		HELPER.addReFramedModel(ReFramed.id("fence_post_inventory_special") , HELPER.auto(ReFramed.id("block/fence_post_inventory")));
-		HELPER.addReFramedModel(ReFramed.id("wall_inventory_special")       , HELPER.auto(new Identifier("block/wall_inventory")));
-		
+		HELPER.addReFramedModel("button_inventory_special"     , HELPER.auto(new Identifier("block/button_inventory")));
+		HELPER.addReFramedModel("fence_inventory_special"      , HELPER.auto(new Identifier("block/fence_inventory")));
+		HELPER.addReFramedModel("fence_post_inventory_special" , HELPER.auto(ReFramed.id("block/fence_post_inventory")));
+		HELPER.addReFramedModel("wall_inventory_special"       , HELPER.auto(new Identifier("block/wall_inventory")));
+
 		//item model assignments (in lieu of models/item/___.json)
-		HELPER.assignItemModel(ReFramed.id("button_inventory_special")      , ReFramed.BUTTON);
-		HELPER.assignItemModel(ReFramed.id("carpet_special")                , ReFramed.CARPET);
-		HELPER.assignItemModel(ReFramed.id("cube_special")                  , ReFramed.CUBE);
-		HELPER.assignItemModel(ReFramed.id("fence_inventory_special")       , ReFramed.FENCE);
-		HELPER.assignItemModel(ReFramed.id("fence_gate_special")            , ReFramed.FENCE_GATE);
-		HELPER.assignItemModel(ReFramed.id("trapdoor_bottom_special")       , ReFramed.IRON_TRAPDOOR);
-		HELPER.assignItemModel(ReFramed.id("fence_post_inventory_special")  , ReFramed.POST);
-		HELPER.assignItemModel(ReFramed.id("pressure_plate_up_special")     , ReFramed.PRESSURE_PLATE);
-		HELPER.assignItemModel(ReFramed.id("slab_special")                  , ReFramed.SLAB);
-		HELPER.assignItemModel(ReFramed.id("stairs_special")                , ReFramed.STAIRS);
-		HELPER.assignItemModel(ReFramed.id("trapdoor_bottom_special")       , ReFramed.TRAPDOOR);
-		HELPER.assignItemModel(ReFramed.id("wall_inventory_special")        , ReFramed.WALL);
+		HELPER.assignItemModel("button_inventory_special"      , ReFramed.BUTTON);
+		HELPER.assignItemModel("carpet_special"                , ReFramed.CARPET);
+		HELPER.assignItemModel("cube_special"                  , ReFramed.CUBE);
+		HELPER.assignItemModel("fence_inventory_special"       , ReFramed.FENCE);
+		HELPER.assignItemModel("fence_gate_special"            , ReFramed.FENCE_GATE);
+		HELPER.assignItemModel("trapdoor_bottom_special"       , ReFramed.IRON_TRAPDOOR);
+		HELPER.assignItemModel("fence_post_inventory_special"  , ReFramed.POST);
+		HELPER.assignItemModel("pressure_plate_up_special"     , ReFramed.PRESSURE_PLATE);
+		HELPER.assignItemModel("slab_special"                  , ReFramed.SLAB);
+		HELPER.assignItemModel("double_slab_special"           , ReFramed.DOUBLE_SLAB);
+		HELPER.assignItemModel("stairs_special"                , ReFramed.STAIRS);
+		HELPER.assignItemModel("double_stairs_special"         , ReFramed.DOUBLE_STAIRS);
+		HELPER.assignItemModel("trapdoor_bottom_special"       , ReFramed.TRAPDOOR);
+		HELPER.assignItemModel("wall_inventory_special"        , ReFramed.WALL);
 	}
 	
 	private void privateInit() {

src/main/java/fr/adrien1106/reframed/client/ReFramedClientHelper.java

@@ -1,8 +1,11 @@
 package fr.adrien1106.reframed.client;
 
-import fr.adrien1106.reframed.client.model.apperance.CamoAppearanceManager;
+import fr.adrien1106.reframed.ReFramed;
 import fr.adrien1106.reframed.client.model.UnbakedAutoRetexturedModel;
+import fr.adrien1106.reframed.client.model.UnbakedDoubleRetexturedModel;
 import fr.adrien1106.reframed.client.model.UnbakedJsonRetexturedModel;
+import fr.adrien1106.reframed.client.model.UnbakedRetexturedModel;
+import fr.adrien1106.reframed.client.model.apperance.CamoAppearanceManager;
 import net.fabricmc.fabric.api.renderer.v1.Renderer;
 import net.fabricmc.fabric.api.renderer.v1.RendererAccess;
 import net.fabricmc.loader.api.FabricLoader;
@@ -23,20 +26,25 @@ public class ReFramedClientHelper {
 
 	private final ReFramedModelProvider prov;
 
-	public UnbakedModel auto(Identifier parent) {
+
+	public UnbakedRetexturedModel auto(Identifier parent) {
 		return new UnbakedAutoRetexturedModel(parent);
 	}
 
-	public UnbakedModel json(Identifier parent) {
+	public UnbakedRetexturedModel json(Identifier parent) {
 		return new UnbakedJsonRetexturedModel(parent);
 	}
 
-	public void addReFramedModel(Identifier id, UnbakedModel unbaked) {
-		prov.addReFramedModel(id, unbaked);
+	public UnbakedModel autoDouble(Identifier first, Identifier second) {
+		return new UnbakedDoubleRetexturedModel(auto(first), auto(second));
 	}
 
-	public void assignItemModel(Identifier model_id, ItemConvertible... item_convertibles) {
-		prov.assignItemModel(model_id, item_convertibles);
+	public void addReFramedModel(String id, UnbakedModel unbaked) {
+		prov.addReFramedModel(ReFramed.id(id), unbaked);
+	}
+
+	public void assignItemModel(String id, ItemConvertible... item_convertibles) {
+		prov.assignItemModel(ReFramed.id(id), item_convertibles);
 	}
 
 	public CamoAppearanceManager getCamoApperanceManager(Function<SpriteIdentifier, Sprite> spriteLookup) {

src/main/java/fr/adrien1106/reframed/client/ReFramedModelProvider.java

@@ -37,9 +37,9 @@ public class ReFramedModelProvider implements ModelResourceProvider, ModelVarian
 	//but json models are never allowed to have non-json models as a parent, and frame unbaked models are not json models. Ah well.
 	//So, instead, we use a ModelVariantProvider to redirect attempts to load the item:id#inventory model.
 	@Override
-	public @Nullable UnbakedModel loadModelVariant(ModelIdentifier modelId, ModelProviderContext context) {
-		Identifier customModelId = itemAssignments.get(modelId);
-		return customModelId == null ? null : loadModelResource(customModelId, context);
+	public @Nullable UnbakedModel loadModelVariant(ModelIdentifier model, ModelProviderContext context) {
+		Identifier custom_model = itemAssignments.get(model);
+		return custom_model == null ? null : loadModelResource(custom_model, context);
 	}
 	
 	/// camo appearance manager cache

src/main/java/fr/adrien1106/reframed/client/model/DoubleRetexturingBakedModel.java

@@ -0,0 +1,51 @@
+package fr.adrien1106.reframed.client.model;
+
+import net.fabricmc.api.EnvType;
+import net.fabricmc.api.Environment;
+import net.fabricmc.fabric.api.renderer.v1.model.ForwardingBakedModel;
+import net.fabricmc.fabric.api.renderer.v1.render.RenderContext;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.texture.Sprite;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.random.Random;
+import net.minecraft.world.BlockRenderView;
+
+import java.util.List;
+import java.util.function.Supplier;
+
+@Environment(EnvType.CLIENT)
+public class DoubleRetexturingBakedModel extends ForwardingBakedModel implements MultiRetexturableModel {
+
+    private final ForwardingBakedModel model_1, model_2;
+    public DoubleRetexturingBakedModel(ForwardingBakedModel model_1, ForwardingBakedModel model_2) {
+        this.wrapped = model_1.getWrappedModel();
+        this.model_1 = model_1;
+        this.model_2 = model_2;
+    }
+
+    @Override
+    public boolean isVanillaAdapter() {
+        return false;
+    }
+
+    @Override
+    public Sprite getParticleSprite() {
+        return model_1.getParticleSprite();
+    }
+
+    @Override
+    public void emitBlockQuads(BlockRenderView world, BlockState state, BlockPos pos, Supplier<Random> randomSupplier, RenderContext context) {}
+
+    @Override // models are emitted here because no checks are done on items
+    public void emitItemQuads(ItemStack stack, Supplier<Random> randomSupplier, RenderContext context) {
+        model_1.emitItemQuads(stack, randomSupplier, context);
+        model_2.emitItemQuads(stack, randomSupplier, context);
+    }
+
+    @Override
+    public List<BakedModel> models() {
+        return List.of(model_1, model_2);
+    }
+}

src/main/java/fr/adrien1106/reframed/client/model/DynamicBakedModel.java

@@ -6,5 +6,5 @@ import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.BlockRenderView;
 
 public interface DynamicBakedModel {
-    BakedModel computeQuads(BlockRenderView level, BlockState state, BlockPos pos);
+    BakedModel computeQuads(BlockRenderView level, BlockState state, BlockPos pos, int theme_index);
 }

src/main/java/fr/adrien1106/reframed/client/model/MeshTransformUtil.java

@@ -1,83 +0,0 @@
-package fr.adrien1106.reframed.client.model;
-
-import fr.adrien1106.reframed.client.ReFramedClient;
-import net.fabricmc.fabric.api.renderer.v1.mesh.Mesh;
-import net.fabricmc.fabric.api.renderer.v1.mesh.MeshBuilder;
-import net.fabricmc.fabric.api.renderer.v1.mesh.QuadEmitter;
-import net.fabricmc.fabric.api.renderer.v1.render.RenderContext;
-import net.minecraft.client.render.model.ModelBakeSettings;
-import net.minecraft.util.math.Direction;
-import org.joml.Matrix4f;
-import org.joml.Vector3f;
-import org.joml.Vector4f;
-
-import java.util.EnumMap;
-import java.util.Map;
-
-public class MeshTransformUtil {
-	public static Mesh pretransformMesh(Mesh mesh, RetexturingBakedModel.RetexturingTransformer transform) {
-		MeshBuilder builder = ReFramedClient.HELPER.getFabricRenderer().meshBuilder();
-		QuadEmitter emitter = builder.getEmitter();
-		
-		mesh.forEach(quad -> {
-			int i = -1;
-			do {
-				emitter.copyFrom(quad);
-				i = transform.transform(emitter, i);
-			} while (i > 0);
-		});
-		
-		return builder.build();
-	}
-	
-	public static Map<Direction, Direction> facePermutation(Matrix4f mat) {
-		Map<Direction, Direction> facePermutation = new EnumMap<>(Direction.class);
-		for(Direction input : Direction.values()) {
-			Direction output = Direction.transform(mat, input);
-			facePermutation.put(input, output);
-		}
-		return facePermutation;
-	}
-	
-	public static RenderContext.QuadTransform applyAffine(ModelBakeSettings settings) {
-		return applyMatrix(settings.getRotation().getMatrix());
-	}
-	
-	public static RenderContext.QuadTransform applyMatrix(Matrix4f mat) {
-		Map<Direction, Direction> facePermutation = facePermutation(mat);
-		Vector3f pos3 = new Vector3f();
-		Vector4f pos4 = new Vector4f();
-		
-		return quad -> {
-			//For each vertex:
-			for(int i = 0; i < 4; i++) {
-				//Copy pos into a vec3, then a vec4. the w component is set to 0 since this is a point, not a normal
-				quad.copyPos(i, pos3);
-				pos3.add(-0.5f, -0.5f, -0.5f);
-				pos4.set(pos3, 0);
-				
-				//Compute the matrix-vector product. This function mutates the vec4 in-place.
-				//Note that `transformAffine` has the same purpose as `transform`; the difference is it
-				//assumes (without checking) that the last row of the matrix is 0,0,0,1, as an optimization
-				mat.transform(pos4);
-				
-				//Manually copy the data back onto the vertex
-				quad.pos(i, pos4.x + 0.5f, pos4.y + 0.5f, pos4.z + 0.5f);
-			}
-			
-			//permute tags
-			int tag = quad.tag();
-			if(tag != 0) quad.tag(facePermutation.get(RetexturingBakedModel.DIRECTIONS[tag - 1]).ordinal() + 1);
-			
-			//permute lighting face (?)
-			quad.nominalFace(facePermutation.get(quad.lightFace()));
-			
-			//permute cullface
-			Direction cull = quad.cullFace();
-			if(cull != null) quad.cullFace(facePermutation.get(cull));
-			
-			//Output the quad
-			return true;
-		};
-	}
-}

src/main/java/fr/adrien1106/reframed/client/model/MultiRetexturableModel.java

@@ -0,0 +1,10 @@
+package fr.adrien1106.reframed.client.model;
+
+import net.minecraft.client.render.model.BakedModel;
+
+import java.util.List;
+
+public interface MultiRetexturableModel {
+
+    List<BakedModel> models();
+}

src/main/java/fr/adrien1106/reframed/client/model/RetexturingBakedModel.java

@@ -1,12 +1,15 @@
 package fr.adrien1106.reframed.client.model;
 
 import fr.adrien1106.reframed.block.ReFramedEntity;
+import fr.adrien1106.reframed.client.ReFramedClient;
 import fr.adrien1106.reframed.client.model.apperance.SpriteProperties;
 import fr.adrien1106.reframed.mixin.MinecraftAccessor;
 import fr.adrien1106.reframed.client.model.apperance.CamoAppearance;
 import fr.adrien1106.reframed.client.model.apperance.CamoAppearanceManager;
 import fr.adrien1106.reframed.client.model.apperance.WeightedComputedAppearance;
+import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.fabricmc.fabric.api.renderer.v1.mesh.Mesh;
+import net.fabricmc.fabric.api.renderer.v1.mesh.MeshBuilder;
 import net.fabricmc.fabric.api.renderer.v1.mesh.MutableQuadView;
 import net.fabricmc.fabric.api.renderer.v1.mesh.QuadEmitter;
 import net.fabricmc.fabric.api.renderer.v1.model.ForwardingBakedModel;
@@ -29,30 +32,44 @@ import java.util.concurrent.ConcurrentMap;
 import java.util.function.Supplier;
 
 public abstract class RetexturingBakedModel extends ForwardingBakedModel {
-	public RetexturingBakedModel(BakedModel baseModel, CamoAppearanceManager tam, ModelBakeSettings settings, BlockState itemModelState, boolean ao) {
-		this.wrapped = baseModel; //field from the superclass; vanilla getQuads etc. will delegate through to this
-		
+	public RetexturingBakedModel(BakedModel base_model, CamoAppearanceManager tam, int theme_index, ModelBakeSettings settings, BlockState item_state, boolean ao) {
+		this.wrapped = base_model; //field from the superclass; vanilla getQuads etc. will delegate through to this
+
 		this.tam = tam;
-		this.uvlock = settings.isUvLocked();
-		this.itemModelState = itemModelState;
+		this.theme_index = theme_index;
+		this.uv_lock = settings.isUvLocked();
+		this.item_state = item_state;
 		this.ao = ao;
 	}
-	
+
 	protected final CamoAppearanceManager tam;
-	protected final boolean uvlock;
-	protected final BlockState itemModelState;
+	protected final int theme_index;
+	protected final boolean uv_lock;
+	protected final BlockState item_state;
 	protected final boolean ao;
-	
+
+	/* ----------------------------------------------- CACHE ELEMENT ------------------------------------------------ */
+	// TODO make static ? for connected textures ?
 	protected record MeshCacheKey(BlockState state, TransformCacheKey transform) {}
-	protected final ConcurrentMap<MeshCacheKey, Mesh> retextured_meshes = new ConcurrentHashMap<>(); //mutable, append-only cache
 	protected record TransformCacheKey(CamoAppearance appearance, int model_id) {}
 	protected final ConcurrentMap<TransformCacheKey, RetexturingTransformer> retextured_transforms = new ConcurrentHashMap<>();
-	
-	protected static final Direction[] DIRECTIONS = Direction.values();
-	protected static final Direction[] DIRECTIONS_AND_NULL = new Direction[DIRECTIONS.length + 1];
-	static { System.arraycopy(DIRECTIONS, 0, DIRECTIONS_AND_NULL, 0, DIRECTIONS.length); }
-	
-	protected abstract Mesh getBaseMesh(BlockState state);
+	protected final ConcurrentMap<MeshCacheKey, Mesh> retextured_meshes = new ConcurrentHashMap<>(); //mutable, append-only cache
+
+	protected static final Direction[] DIRECTIONS_AND_NULL;
+	static {
+		Direction[] values = Direction.values();
+		DIRECTIONS_AND_NULL = new Direction[values.length + 1];
+		System.arraycopy(values, 0, DIRECTIONS_AND_NULL, 0, values.length);
+	}
+
+	protected final ConcurrentMap<BlockState, Mesh> jsonToMesh = new ConcurrentHashMap<>();
+
+	protected Mesh getBaseMesh(BlockState state) {
+		//Convert models to re-texturable Meshes lazily, the first time we encounter each blockstate
+		return jsonToMesh.computeIfAbsent(state, this::convertModel);
+	}
+
+	protected abstract Mesh convertModel(BlockState state);
 	
 	@Override
 	public boolean isVanillaAdapter() {
@@ -61,20 +78,20 @@ public abstract class RetexturingBakedModel extends ForwardingBakedModel {
 	
 	@Override
 	public Sprite getParticleSprite() {
-		return tam.getDefaultAppearance().getSprites(Direction.UP, 0).get(0).sprite();
+		return tam.getDefaultAppearance(theme_index).getSprites(Direction.UP, 0).get(0).sprite();
 	}
 	
 	@Override
 	public void emitBlockQuads(BlockRenderView world, BlockState state, BlockPos pos, Supplier<Random> randomSupplier, RenderContext context) {
-		BlockState theme = (world.getBlockEntityRenderData(pos) instanceof BlockState s) ? s : null;
+		BlockState theme = (world.getBlockEntity(pos) instanceof ThemeableBlockEntity s) ? s.getTheme(theme_index) : null;
 		QuadEmitter quad_emitter = context.getEmitter();
 		if(theme == null || theme.isAir()) {
-			getUntintedRetexturedMesh(new MeshCacheKey(state, new TransformCacheKey(tam.getDefaultAppearance(), 0)), 0).outputTo(quad_emitter);
+			getUntintedRetexturedMesh(new MeshCacheKey(state, new TransformCacheKey(tam.getDefaultAppearance(theme_index), 0)), 0).outputTo(quad_emitter);
 			return;
 		}
 		if(theme.getBlock() == Blocks.BARRIER) return;
 		
-		CamoAppearance camo = tam.getCamoAppearance(world, theme, pos);
+		CamoAppearance camo = tam.getCamoAppearance(world, theme, pos, theme_index);
 		long seed = theme.getRenderingSeed(pos);
 		int model_id = 0;
 		if (camo instanceof WeightedComputedAppearance wca) model_id = wca.getAppearanceIndex(seed);
@@ -105,16 +122,16 @@ public abstract class RetexturingBakedModel extends ForwardingBakedModel {
 		//none of this is accessible unless you're in creative mode doing ctrl-pick btw
 		CamoAppearance nbtAppearance;
 		int tint;
-		BlockState theme = ReFramedEntity.readStateFromItem(stack);
+		BlockState theme = ReFramedEntity.readStateFromItem(stack, theme_index);
 		if(!theme.isAir()) {
-			nbtAppearance = tam.getCamoAppearance(null, theme, null);
+			nbtAppearance = tam.getCamoAppearance(null, theme, null, theme_index);
 			tint = 0xFF000000 | ((MinecraftAccessor) MinecraftClient.getInstance()).getItemColors().getColor(new ItemStack(theme.getBlock()), 0);
 		} else {
-			nbtAppearance = tam.getDefaultAppearance();
+			nbtAppearance = tam.getDefaultAppearance(theme_index);
 			tint = 0xFFFFFFFF;
 		}
 		
-		Mesh untintedMesh = getUntintedRetexturedMesh(new MeshCacheKey(itemModelState, new TransformCacheKey(nbtAppearance, 0)), 0);
+		Mesh untintedMesh = getUntintedRetexturedMesh(new MeshCacheKey(item_state, new TransformCacheKey(nbtAppearance, 0)), 0);
 
 		QuadEmitter quad_emitter = context.getEmitter();
 		if(tint == 0xFFFFFFFF) {
@@ -132,7 +149,22 @@ public abstract class RetexturingBakedModel extends ForwardingBakedModel {
 	
 	protected Mesh createUntintedRetexturedMesh(MeshCacheKey key, long seed) {
 		RetexturingTransformer transformer = retextured_transforms.computeIfAbsent(key.transform, (k) -> new RetexturingTransformer(k.appearance, seed));
-		return MeshTransformUtil.pretransformMesh(getBaseMesh(key.state), transformer);
+		return pretransformMesh(getBaseMesh(key.state), transformer);
+	}
+
+	private static Mesh pretransformMesh(Mesh mesh, RetexturingTransformer transform) {
+		MeshBuilder builder = ReFramedClient.HELPER.getFabricRenderer().meshBuilder();
+		QuadEmitter emitter = builder.getEmitter();
+
+		mesh.forEach(quad -> {
+			int i = -1;
+			do {
+				emitter.copyFrom(quad);
+				i = transform.transform(emitter, i);
+			} while (i > 0);
+		});
+
+		return builder.build();
 	}
 	
 	public class RetexturingTransformer {
@@ -161,7 +193,7 @@ public abstract class RetexturingBakedModel extends ForwardingBakedModel {
 					properties.sprite(),
 					MutableQuadView.BAKE_NORMALIZED
 						| properties.flags()
-						| (uvlock ? MutableQuadView.BAKE_LOCK_UV : 0)
+						| (uv_lock ? MutableQuadView.BAKE_LOCK_UV : 0)
 				);
 				quad.tag(i+1);
 				quad.emit();
@@ -175,7 +207,7 @@ public abstract class RetexturingBakedModel extends ForwardingBakedModel {
 			// apply new quad shape
 			quad.material(ta.getRenderMaterial(ao));
 			bounds.intersection(origin_bounds, direction.getAxis()).apply(quad, origin_bounds);
-			quad.spriteBake( // TODO check if the flags are usefull because it seems to be braking the functioning of it
+			quad.spriteBake( // seems to work without the flags and break with it
 				properties.sprite(),
 				MutableQuadView.BAKE_NORMALIZED
 					| MutableQuadView.BAKE_LOCK_UV

src/main/java/fr/adrien1106/reframed/client/model/UnbakedAutoRetexturedModel.java

@@ -12,7 +12,6 @@ import net.minecraft.client.render.model.BakedModel;
 import net.minecraft.client.render.model.BakedQuad;
 import net.minecraft.client.render.model.Baker;
 import net.minecraft.client.render.model.ModelBakeSettings;
-import net.minecraft.client.render.model.UnbakedModel;
 import net.minecraft.client.texture.Sprite;
 import net.minecraft.client.util.SpriteIdentifier;
 import net.minecraft.util.Identifier;
@@ -20,50 +19,27 @@ import net.minecraft.util.math.Direction;
 import net.minecraft.util.math.random.Random;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.Collection;
-import java.util.Collections;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentMap;
 import java.util.function.Function;
 
-public class UnbakedAutoRetexturedModel implements UnbakedModel {
+public class UnbakedAutoRetexturedModel extends UnbakedRetexturedModel {
+
 	public UnbakedAutoRetexturedModel(Identifier parent) {
-		this.parent = parent;
-	}
-	
-	protected final Identifier parent;
-	protected BlockState itemModelState = Blocks.AIR.getDefaultState();
-	protected boolean ao = true;
-	
-	@Override
-	public Collection<Identifier> getModelDependencies() {
-		return Collections.singletonList(parent);
-	}
-	
-	@Override
-	public void setParents(Function<Identifier, UnbakedModel> function) {
-		function.apply(parent).setParents(function);
+		super(parent);
+		item_state = Blocks.AIR.getDefaultState();
 	}
 	
 	@Nullable
 	@Override
-	public BakedModel bake(Baker baker, Function<SpriteIdentifier, Sprite> spriteLookup, ModelBakeSettings modelBakeSettings, Identifier identifier) {
+	public BakedModel bake(Baker baker, Function<SpriteIdentifier, Sprite> texture_getter, ModelBakeSettings bake_settings, Identifier identifier) {
 		return new RetexturingBakedModel(
-			baker.bake(parent, modelBakeSettings),
-			ReFramedClient.HELPER.getCamoApperanceManager(spriteLookup),
-			modelBakeSettings,
-			itemModelState,
+			baker.bake(parent, bake_settings),
+			ReFramedClient.HELPER.getCamoApperanceManager(texture_getter),
+			theme_index,
+			bake_settings,
+			item_state,
 			ao
 		) {
-			final ConcurrentMap<BlockState, Mesh> jsonToMesh = new ConcurrentHashMap<>();
-			
-			@Override
-			protected Mesh getBaseMesh(BlockState state) {
-				//Convert models to retexturable Meshes lazily, the first time we encounter each blockstate
-				return jsonToMesh.computeIfAbsent(state, this::convertModel);
-			}
-			
-			private Mesh convertModel(BlockState state) {
+			protected Mesh convertModel(BlockState state) {
 				Renderer r = ReFramedClient.HELPER.getFabricRenderer();
 				MeshBuilder builder = r.meshBuilder();
 				QuadEmitter emitter = builder.getEmitter();

src/main/java/fr/adrien1106/reframed/client/model/UnbakedDoubleRetexturedModel.java

@@ -0,0 +1,48 @@
+package fr.adrien1106.reframed.client.model;
+
+import net.fabricmc.fabric.api.renderer.v1.model.ForwardingBakedModel;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.Baker;
+import net.minecraft.client.render.model.ModelBakeSettings;
+import net.minecraft.client.render.model.UnbakedModel;
+import net.minecraft.client.texture.Sprite;
+import net.minecraft.client.util.SpriteIdentifier;
+import net.minecraft.util.Identifier;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.function.Function;
+
+public class UnbakedDoubleRetexturedModel implements UnbakedModel {
+
+    protected final UnbakedModel model_1;
+    protected final UnbakedModel model_2;
+
+    public UnbakedDoubleRetexturedModel(UnbakedRetexturedModel model_1, UnbakedRetexturedModel model_2) {
+        this.model_1 = model_1;
+        this.model_2 = model_2;
+        model_2.setThemeIndex(2);
+    }
+
+
+    @Override
+    public Collection<Identifier> getModelDependencies() {
+        return List.of(((List<Identifier>) model_1.getModelDependencies()).get(0), ((List<Identifier>) model_2.getModelDependencies()).get(0));
+    }
+
+    @Override
+    public void setParents(Function<Identifier, UnbakedModel> function) {
+        model_1.setParents(function);
+        model_2.setParents(function);
+    }
+
+    @Nullable
+    @Override
+    public BakedModel bake(Baker baker, Function<SpriteIdentifier, Sprite> texture_getter, ModelBakeSettings model_bake_settings, Identifier identifier) {
+        return new DoubleRetexturingBakedModel(
+            (ForwardingBakedModel) model_1.bake(baker, texture_getter, model_bake_settings, identifier),
+            (ForwardingBakedModel) model_2.bake(baker, texture_getter, model_bake_settings, identifier)
+        );
+    }
+}

src/main/java/fr/adrien1106/reframed/client/model/UnbakedJsonRetexturedModel.java

@@ -8,7 +8,10 @@ import net.fabricmc.fabric.api.renderer.v1.mesh.Mesh;
 import net.fabricmc.fabric.api.renderer.v1.mesh.MeshBuilder;
 import net.fabricmc.fabric.api.renderer.v1.mesh.QuadEmitter;
 import net.minecraft.block.BlockState;
-import net.minecraft.client.render.model.*;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.BakedQuad;
+import net.minecraft.client.render.model.Baker;
+import net.minecraft.client.render.model.ModelBakeSettings;
 import net.minecraft.client.texture.Sprite;
 import net.minecraft.client.util.SpriteIdentifier;
 import net.minecraft.screen.PlayerScreenHandler;
@@ -17,61 +20,34 @@ import net.minecraft.util.math.Direction;
 import net.minecraft.util.math.random.Random;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.Collection;
-import java.util.Collections;
 import java.util.Objects;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentMap;
 import java.util.function.Function;
 
-public class UnbakedJsonRetexturedModel implements UnbakedModel {
+public class UnbakedJsonRetexturedModel extends UnbakedRetexturedModel {
 	public UnbakedJsonRetexturedModel(Identifier parent) {
-		this.parent = parent;
-	}
-	
-	protected final Identifier parent;
-	protected BlockState itemModelState;
-	protected boolean ao = true;
-	
-	@Override
-	public Collection<Identifier> getModelDependencies() {
-		return Collections.singletonList(parent);
-	}
-	
-	@Override
-	public void setParents(Function<Identifier, UnbakedModel> function) {
-		function.apply(parent).setParents(function);
+        super(parent);
 	}
 	
 	@Nullable
 	@Override
-	public BakedModel bake(Baker baker, Function<SpriteIdentifier, Sprite> spriteLookup, ModelBakeSettings modelBakeSettings, Identifier identifier) {
-		Direction[] DIRECTIONS = RetexturingBakedModel.DIRECTIONS;
+	public BakedModel bake(Baker baker, Function<SpriteIdentifier, Sprite> spriteLookup, ModelBakeSettings bake_settings, Identifier identifier) {
+		Direction[] directions = Direction.values();
 		
-		Sprite[] specialSprites = new Sprite[DIRECTIONS.length];
-		for(int i = 0; i < DIRECTIONS.length; i++) {
-			SpriteIdentifier id = new SpriteIdentifier(PlayerScreenHandler.BLOCK_ATLAS_TEXTURE, ReFramed.id("reframed_special/" + DIRECTIONS[i].getName()));
-			specialSprites[i] = Objects.requireNonNull(spriteLookup.apply(id), () -> "Couldn't find sprite " + id + " !");
+		Sprite[] sprites = new Sprite[directions.length];
+		for(int i = 0; i < directions.length; i++) {
+			SpriteIdentifier id = new SpriteIdentifier(PlayerScreenHandler.BLOCK_ATLAS_TEXTURE, ReFramed.id("reframed_special/" + directions[i].getName()));
+			sprites[i] = Objects.requireNonNull(spriteLookup.apply(id), () -> "Couldn't find sprite " + id + " !");
 		}
 
-		BakedModel model = baker.bake(parent, modelBakeSettings);
-
 		return new RetexturingBakedModel(
-			model,
+			baker.bake(parent, bake_settings),
 			ReFramedClient.HELPER.getCamoApperanceManager(spriteLookup),
-			modelBakeSettings,
-			itemModelState,
+			theme_index,
+			bake_settings,
+			item_state,
 			ao
 		) {
-			final ConcurrentMap<BlockState, Mesh> jsonToMesh = new ConcurrentHashMap<>();
-			
-			@Override
-			protected Mesh getBaseMesh(BlockState state) {
-				//Convert models to re-texturable Meshes lazily, the first time we encounter each blockstate
-				return jsonToMesh.computeIfAbsent(state, this::convertModel);
-			}
-			
-			private Mesh convertModel(BlockState state) {
+			protected Mesh convertModel(BlockState state) {
 				Renderer r = ReFramedClient.HELPER.getFabricRenderer();
 				MeshBuilder builder = r.meshBuilder();
 				QuadEmitter emitter = builder.getEmitter();
@@ -84,9 +60,9 @@ public class UnbakedJsonRetexturedModel implements UnbakedModel {
 						emitter.fromVanilla(quad, mat, cullFace);
 						
 						QuadUvBounds bounds = QuadUvBounds.read(emitter);
-						for(int i = 0; i < specialSprites.length; i++) {
-							if(bounds.displaysSprite(specialSprites[i])) {
-								bounds.normalizeUv(emitter, specialSprites[i]);
+						for(int i = 0; i < sprites.length; i++) {
+							if(bounds.displaysSprite(sprites[i])) {
+								bounds.normalizeUv(emitter, sprites[i]);
 								emitter.tag(i + 1);
 								break;
 							}

src/main/java/fr/adrien1106/reframed/client/model/UnbakedRetexturedModel.java

@@ -0,0 +1,36 @@
+package fr.adrien1106.reframed.client.model;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.client.render.model.UnbakedModel;
+import net.minecraft.util.Identifier;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.function.Function;
+
+public abstract class UnbakedRetexturedModel implements UnbakedModel {
+
+    protected final Identifier parent;
+
+    protected int theme_index = 1;
+    protected BlockState item_state;
+    protected boolean ao = true;
+
+    public UnbakedRetexturedModel(Identifier parent) {
+        this.parent = parent;
+    }
+
+    public void setThemeIndex(int theme_index) {
+        this.theme_index = theme_index;
+    }
+
+    @Override
+    public Collection<Identifier> getModelDependencies() {
+        return List.of(parent);
+    }
+
+    @Override
+    public void setParents(Function<Identifier, UnbakedModel> function) {
+        function.apply(parent).setParents(function);
+    }
+}

src/main/java/fr/adrien1106/reframed/client/model/apperance/CamoAppearanceManager.java

@@ -44,37 +44,42 @@ public class CamoAppearanceManager {
 			materialsWithAo.put(blend, finder.ambientOcclusion(TriState.DEFAULT).find()); //not "true" since that *forces* AO, i just want to *allow* AO
 		}
 		
-		Sprite defaultSprite = spriteLookup.apply(DEFAULT_SPRITE_ID);
-		if(defaultSprite == null) throw new IllegalStateException("Couldn't locate " + DEFAULT_SPRITE_ID + " !");
-		this.defaultAppearance = new SingleSpriteAppearance(defaultSprite, materialsWithoutAo.get(BlendMode.CUTOUT), serialNumber.getAndIncrement());
-		
-		Sprite barrier = spriteLookup.apply(BARRIER_SPRITE_ID);
-		if(barrier == null) barrier = defaultSprite; //eh
-		this.barrierItemAppearance = new SingleSpriteAppearance(barrier, materialsWithoutAo.get(BlendMode.CUTOUT), serialNumber.getAndIncrement());
+		Sprite sprite = spriteLookup.apply(DEFAULT_SPRITE_MAIN);
+		if(sprite == null) throw new IllegalStateException("Couldn't locate " + DEFAULT_SPRITE_MAIN + " !");
+		this.default_appearance = new SingleSpriteAppearance(sprite, materialsWithoutAo.get(BlendMode.CUTOUT), serial_number.getAndIncrement());
+
+		sprite = spriteLookup.apply(DEFAULT_SPRITE_SECONDARY);
+		if(sprite == null) throw new IllegalStateException("Couldn't locate " + DEFAULT_SPRITE_MAIN + " !");
+		this.accent_appearance = new SingleSpriteAppearance(sprite, materialsWithoutAo.get(BlendMode.CUTOUT), serial_number.getAndIncrement());
+
+		sprite = spriteLookup.apply(BARRIER_SPRITE_ID);
+		this.barrierItemAppearance = new SingleSpriteAppearance(sprite, materialsWithoutAo.get(BlendMode.CUTOUT), serial_number.getAndIncrement());
 	}
 
-	protected static final SpriteIdentifier DEFAULT_SPRITE_ID = new SpriteIdentifier(PlayerScreenHandler.BLOCK_ATLAS_TEXTURE, new Identifier(ReFramed.MODID, "block/framed_block"));
+	protected static final SpriteIdentifier DEFAULT_SPRITE_MAIN = new SpriteIdentifier(PlayerScreenHandler.BLOCK_ATLAS_TEXTURE, new Identifier(ReFramed.MODID, "block/framed_block"));
+	protected static final SpriteIdentifier DEFAULT_SPRITE_SECONDARY = new SpriteIdentifier(PlayerScreenHandler.BLOCK_ATLAS_TEXTURE, new Identifier(ReFramed.MODID, "block/framed_accent_block"));
 	private static final SpriteIdentifier BARRIER_SPRITE_ID = new SpriteIdentifier(PlayerScreenHandler.BLOCK_ATLAS_TEXTURE, new Identifier("minecraft:item/barrier"));
 	
-	private final CamoAppearance defaultAppearance;
+	private final CamoAppearance default_appearance;
+	private final CamoAppearance accent_appearance;
 	private final CamoAppearance barrierItemAppearance;
 	
 	private final ConcurrentHashMap<BlockState, CamoAppearance> appearanceCache = new ConcurrentHashMap<>(); //Mutable, append-only cache
-	private final AtomicInteger serialNumber = new AtomicInteger(0); //Mutable
+	private final AtomicInteger serial_number = new AtomicInteger(0); //Mutable
 	
 	private final EnumMap<BlendMode, RenderMaterial> materialsWithAo = new EnumMap<>(BlendMode.class);
 	private final EnumMap<BlendMode, RenderMaterial> materialsWithoutAo = new EnumMap<>(BlendMode.class); //Immutable contents
 	
-	public CamoAppearance getDefaultAppearance() {
-		return defaultAppearance;
+	public CamoAppearance getDefaultAppearance(int appearance) {
+		return appearance == 2 ? accent_appearance: default_appearance;
 	}
 	
-	public CamoAppearance getCamoAppearance(BlockRenderView world, BlockState state, BlockPos pos) {
+	public CamoAppearance getCamoAppearance(BlockRenderView world, BlockState state, BlockPos pos, int theme_index) {
 		BakedModel model = MinecraftClient.getInstance().getBlockRenderManager().getModel(state);
 
 		// add support for connected textures and more generally any compatible models injected so that they return baked quads
 		if (model instanceof DynamicBakedModel dynamic_model) {
-			return computeAppearance(dynamic_model.computeQuads(world, state, pos), state);
+			return computeAppearance(dynamic_model.computeQuads(world, state, pos, theme_index), state);
 		}
 		return appearanceCache.computeIfAbsent(state, block_state -> computeAppearance(model, block_state));
 	}
@@ -96,7 +101,7 @@ public class CamoAppearanceManager {
 				getAppearance(model),
 				getCachedMaterial(state, true),
 				getCachedMaterial(state, false),
-				serialNumber.getAndIncrement()
+				serial_number.getAndIncrement()
 			);
 		}
 		List<Weighted.Present<Appearance>> appearances = weighted_model.getModels().stream()
@@ -107,7 +112,7 @@ public class CamoAppearanceManager {
 			appearances,
 			getCachedMaterial(state, true),
 			getCachedMaterial(state, false),
-			serialNumber.getAndIncrement()
+			serial_number.getAndIncrement()
 		);
 	}
 
@@ -124,7 +129,7 @@ public class CamoAppearanceManager {
 		Arrays.stream(Direction.values()).forEach(direction -> {
 			List<BakedQuad> quads = model.getQuads(null, direction, random);
 			if(quads.isEmpty()) { // add default appearance if none present
-				sprites.put(direction, defaultAppearance.getSprites(direction, 0));
+				sprites.put(direction, default_appearance.getSprites(direction, 0));
 				return;
 			}
 

src/main/java/fr/adrien1106/reframed/generator/Generator.java

@@ -13,7 +13,7 @@ public class Generator implements DataGeneratorEntrypoint {
     /**
      *  missing DOOR, IRON_DOOR, CANDLE
      */
-    public static List<Block> BLOCKS = List.of(CUBE, STAIRS, SLAB, POST, FENCE, FENCE_GATE, TRAPDOOR, IRON_TRAPDOOR, PRESSURE_PLATE, BUTTON, LEVER, WALL, CARPET, PANE);
+    public static List<Block> BLOCKS = List.of(CUBE, STAIRS, DOUBLE_STAIRS, SLAB, DOUBLE_SLAB, POST, FENCE, FENCE_GATE, TRAPDOOR, IRON_TRAPDOOR, PRESSURE_PLATE, BUTTON, LEVER, WALL, CARPET, PANE);
     @Override
     public void onInitializeDataGenerator(FabricDataGenerator data_generator) {
         FabricDataGenerator.Pack myPack = data_generator.createPack();

src/main/java/fr/adrien1106/reframed/mixin/BlockMixin.java

@@ -1,46 +0,0 @@
-package fr.adrien1106.reframed.mixin;
-
-import com.llamalad7.mixinextras.sugar.Local;
-import fr.adrien1106.reframed.block.ReFramedEntity;
-import net.minecraft.block.Block;
-import net.minecraft.block.BlockState;
-import net.minecraft.block.entity.BlockEntity;
-import net.minecraft.util.function.BooleanBiFunction;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.util.math.Direction;
-import net.minecraft.util.shape.VoxelShape;
-import net.minecraft.util.shape.VoxelShapes;
-import net.minecraft.world.BlockView;
-import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.*;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
-
-@Mixin(Block.class)
-public class BlockMixin {
-
-    @Redirect(method = "shouldDrawSide", at = @At(value = "INVOKE", target = "Lnet/minecraft/block/BlockState;isOpaque()Z"))
-    private static boolean isNeighborCamoOpaque(BlockState state, @Local(argsOnly = true) BlockView world, @Local(ordinal = 1, argsOnly = true) BlockPos pos) {
-        BlockEntity block_entity = world.getBlockEntity(pos);
-        if (!(block_entity instanceof ReFramedEntity frame_entity)) return state.isOpaque();
-        return frame_entity.getThemeState().isOpaque();
-    }
-
-    @Redirect(method = "shouldDrawSide", at = @At(value = "INVOKE", target = "Lnet/minecraft/block/BlockState;isSideInvisible(Lnet/minecraft/block/BlockState;Lnet/minecraft/util/math/Direction;)Z"))
-    private static boolean isCamoInvisible(BlockState state, BlockState other_state, Direction direction, @Local(argsOnly = true) BlockView world, @Local(ordinal = 0, argsOnly = true) BlockPos pos, @Local(ordinal = 1, argsOnly = true) BlockPos other_pos) {
-        if (world.getBlockEntity(other_pos) instanceof ReFramedEntity entity) other_state = entity.getThemeState();
-        if (world.getBlockEntity(pos) instanceof ReFramedEntity entity) state = entity.getThemeState();
-        return state.isSideInvisible(other_state, direction);
-    }
-
-    @Inject(method = "shouldDrawSide", at = @At(value = "RETURN", ordinal = 0), cancellable = true)
-    private static void shouldDrawGlassCamoSide(BlockState state, BlockView world, BlockPos pos, Direction side, BlockPos other_pos, CallbackInfoReturnable<Boolean> cir, @Local(ordinal = 1) BlockState neighbor) {
-        if (!(world.getBlockEntity(pos) instanceof ReFramedEntity) && !(world.getBlockEntity(other_pos) instanceof ReFramedEntity)) return;
-        VoxelShape voxel_block = state.getCullingFace(world, pos, side);
-        if (voxel_block.isEmpty()) {
-            cir.setReturnValue(true);
-            return;
-        }
-        VoxelShape voxel_neighbor = neighbor.getCullingFace(world, pos, side.getOpposite());
-        cir.setReturnValue(VoxelShapes.matchesAnywhere(voxel_block, voxel_neighbor, BooleanBiFunction.ONLY_FIRST));
-    }
-}

src/main/java/fr/adrien1106/reframed/mixin/compat/AthenaBakedModelMixin.java

@@ -6,6 +6,7 @@ import earth.terrarium.athena.api.client.models.AthenaBlockModel;
 import fr.adrien1106.reframed.client.ReFramedClient;
 import fr.adrien1106.reframed.client.model.DynamicBakedModel;
 import fr.adrien1106.reframed.compat.RebakedAthenaModel;
+import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
 import net.fabricmc.fabric.api.renderer.v1.Renderer;
 import net.fabricmc.fabric.api.renderer.v1.mesh.MutableQuadView;
@@ -39,35 +40,41 @@ public abstract class AthenaBakedModelMixin implements DynamicBakedModel, BakedM
      * @return - the rebakedmodel containing the computed quads
      */
     @Override
-    public BakedModel computeQuads(BlockRenderView level, BlockState state, BlockPos pos) {
-        if (level == null || pos == null) return this;
-
+    public BakedModel computeQuads(BlockRenderView level, BlockState state, BlockPos pos, int theme_index) {
         Map<Direction, List<BakedQuad>> face_quads = new HashMap<>();
-
         Renderer r = ReFramedClient.HELPER.getFabricRenderer();
         QuadEmitter emitter = r.meshBuilder().getEmitter();
 
         WrappedGetter getter = new WrappedGetter(level);
         Arrays.stream(Direction.values()).forEach(direction -> {
             face_quads.put(direction, new ArrayList<>());
-            model.getQuads(getter, state, pos, direction).forEach(sprite -> face_quads.computeIfPresent(direction, (d, quads) -> {
-                Sprite texture = textures.get(sprite.sprite());
-                if (texture == null) return quads;
-                emitter.square(direction, sprite.left(), sprite.bottom(), sprite.right(), sprite.top(), sprite.depth());
 
-                int flag = MutableQuadView.BAKE_LOCK_UV;
+            (level == null || pos == null
+                ? model.getDefaultQuads(direction).get(direction)
+                : model.getQuads(
+                    getter,
+                    level.getBlockEntity(pos) instanceof ThemeableBlockEntity framed_entity
+                        ? framed_entity.getTheme(theme_index)
+                        : state, pos, direction)
+                )
+                .forEach(sprite -> face_quads.computeIfPresent(direction, (d, quads) -> {
+                    Sprite texture = textures.get(sprite.sprite());
+                    if (texture == null) return quads;
+                    emitter.square(direction, sprite.left(), sprite.bottom(), sprite.right(), sprite.top(), sprite.depth());
 
-                switch (sprite.rotation()) {
-                    case CLOCKWISE_90 -> flag |= MutableQuadView.BAKE_ROTATE_90;
-                    case CLOCKWISE_180 -> flag |= MutableQuadView.BAKE_ROTATE_180;
-                    case COUNTERCLOCKWISE_90 -> flag |= MutableQuadView.BAKE_ROTATE_270;
-                }
+                    int flag = MutableQuadView.BAKE_LOCK_UV;
 
-                emitter.spriteBake(texture, flag);
-                emitter.color(-1, -1, -1, -1);
-                quads.add(emitter.toBakedQuad(texture));
-                return quads;
-            }));
+                    switch (sprite.rotation()) {
+                        case CLOCKWISE_90 -> flag |= MutableQuadView.BAKE_ROTATE_90;
+                        case CLOCKWISE_180 -> flag |= MutableQuadView.BAKE_ROTATE_180;
+                        case COUNTERCLOCKWISE_90 -> flag |= MutableQuadView.BAKE_ROTATE_270;
+                    }
+
+                    emitter.spriteBake(texture, flag);
+                    emitter.color(-1, -1, -1, -1);
+                    quads.add(emitter.toBakedQuad(texture));
+                    return quads;
+                }));
         });
 
         return new RebakedAthenaModel(face_quads);

src/main/java/fr/adrien1106/reframed/mixin/compat/AthenaConnectedBlockModelMixin.java

@@ -3,7 +3,7 @@ package fr.adrien1106.reframed.mixin.compat;
 import earth.terrarium.athena.api.client.utils.AppearanceAndTintGetter;
 import earth.terrarium.athena.api.client.utils.CtmUtils;
 import earth.terrarium.athena.impl.client.models.ConnectedBlockModel;
-import fr.adrien1106.reframed.block.ReFramedEntity;
+import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.minecraft.block.BlockState;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Direction;
@@ -22,8 +22,8 @@ public class AthenaConnectedBlockModelMixin {
             "Lnet/minecraft/util/math/Direction;)Z"))
     private boolean checkForCull(AppearanceAndTintGetter level, BlockState state, BlockPos pos, Direction direction) {
         // Always get all the textures unless its another block then use default behaviour
-        if (level.getBlockEntity(pos) instanceof ReFramedEntity
-            || level.getBlockEntity(pos.offset(direction)) instanceof ReFramedEntity)
+        if (level.getBlockEntity(pos) instanceof ThemeableBlockEntity
+            || level.getBlockEntity(pos.offset(direction)) instanceof ThemeableBlockEntity)
             return false;
         return CtmUtils.checkRelative(level, state, pos, direction);
     }

src/main/java/fr/adrien1106/reframed/mixin/compat/AthenaWrappedGetterMixin.java

@@ -1,45 +1,30 @@
 package fr.adrien1106.reframed.mixin.compat;
 
+import com.llamalad7.mixinextras.sugar.Local;
 import earth.terrarium.athena.api.client.fabric.WrappedGetter;
-import fr.adrien1106.reframed.block.ReFramedEntity;
+import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.minecraft.block.BlockState;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.BlockRenderView;
-import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.Redirect;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
 @Mixin(WrappedGetter.class)
 public class AthenaWrappedGetterMixin {
 
-    @Shadow @Final private BlockRenderView getter;
-
-    @Inject(method = "getBlockState", at = @At(value = "HEAD"), cancellable = true)
-    private void getCamoState(BlockPos pos, CallbackInfoReturnable<BlockState> cir) {
-        if (!(getter.getBlockEntity(pos) instanceof ReFramedEntity framed_entity)) return;
-        cir.setReturnValue(framed_entity.getThemeState());
-    }
-
-    @Redirect(method = "getAppearance(Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/Direction;)" +
-        "Lnet/minecraft/block/BlockState;",
-        at = @At(value = "INVOKE", target = "Lnet/minecraft/world/BlockRenderView;" +
-            "getBlockState(Lnet/minecraft/util/math/BlockPos;)" +
-            "Lnet/minecraft/block/BlockState;"))
-    private BlockState appearanceCamoState(BlockRenderView world, BlockPos pos) {
-        if (world.getBlockEntity(pos) instanceof ReFramedEntity framed_entity) return framed_entity.getThemeState();
-        return world.getBlockState(pos);
-    }
-
     @Redirect(method = "query",
         at = @At(value = "INVOKE", target = "Lnet/minecraft/world/BlockRenderView;" +
             "getBlockState(Lnet/minecraft/util/math/BlockPos;)" +
             "Lnet/minecraft/block/BlockState;"))
-    private BlockState queryCamoState(BlockRenderView world, BlockPos pos) {
-        if (world.getBlockEntity(pos) instanceof ReFramedEntity framed_entity) return framed_entity.getThemeState();
+    private BlockState queryCamoState(BlockRenderView world, BlockPos pos, @Local(argsOnly = true) BlockState reference_state) {
+        // get Any that will connect or return any other (/!\ isOf is an uncertain check)
+        if (world.getBlockEntity(pos) instanceof ThemeableBlockEntity framed_entity)
+            return framed_entity.getThemes()
+                .stream()
+                .filter(state -> reference_state.isOf(state.getBlock()))
+                .findAny()
+                .orElse(framed_entity.getTheme(1));
         return world.getBlockState(pos);
     }
 }

src/main/java/fr/adrien1106/reframed/mixin/particles/MixinBlockDustParticle.java

@@ -1,5 +1,6 @@
 package fr.adrien1106.reframed.mixin.particles;
 
+import fr.adrien1106.reframed.block.ReFramedBlock;
 import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.minecraft.block.BlockState;
 import net.minecraft.client.MinecraftClient;
@@ -20,8 +21,11 @@ public class MixinBlockDustParticle {
 	)
 	void modifyParticleSprite(ClientWorld clientWorld, double d, double e, double f, double g, double h, double i, BlockState state, BlockPos pos, CallbackInfo ci) {
 		AccessorParticle a = (AccessorParticle) this;
-		if(a.getRandom().nextBoolean() && clientWorld.getBlockEntity(pos) instanceof ThemeableBlockEntity themeable) {
-			BlockState theme = themeable.getThemeState();
+		if(a.getRandom().nextBoolean()
+			&& clientWorld.getBlockEntity(pos) instanceof ThemeableBlockEntity themeable
+			&& state.getBlock() instanceof ReFramedBlock block
+		) {
+			BlockState theme = themeable.getTheme(block.getTopThemeIndex(state));
 			if(theme == null || theme.isAir()) return;
 			
 			Sprite replacement = MinecraftClient.getInstance().getBlockRenderManager().getModels().getModelParticleSprite(theme);

src/main/java/fr/adrien1106/reframed/mixin/particles/MixinEntity.java

@@ -1,31 +1,31 @@
 package fr.adrien1106.reframed.mixin.particles;
 
+import com.llamalad7.mixinextras.sugar.Local;
+import fr.adrien1106.reframed.block.ReFramedBlock;
 import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.Entity;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.ModifyArg;
 
 @Mixin(Entity.class)
 public abstract class MixinEntity {
-	@Shadow @Deprecated public abstract BlockPos getLandingPos(); //TODO, somewhat expensive method
-	
 	@ModifyArg(
 		method = "spawnSprintingParticles",
 		at = @At(value = "INVOKE", target = "Lnet/minecraft/particle/BlockStateParticleEffect;<init>(Lnet/minecraft/particle/ParticleType;Lnet/minecraft/block/BlockState;)V")
 	)
-	private BlockState modifyParticleState(BlockState origState) {
+	private BlockState modifyParticleState(BlockState state, @Local(ordinal = 0) BlockPos landing_pos) {
 		World world = ((Entity) (Object) this).getWorld();
 		
-		if(world.getBlockEntity(getLandingPos()) instanceof ThemeableBlockEntity themeable) {
-			BlockState theme = themeable.getThemeState();
-			if(!theme.isAir()) return theme;
+		if(world.getBlockEntity(landing_pos) instanceof ThemeableBlockEntity themeable
+			&& state.getBlock() instanceof ReFramedBlock block) {
+				BlockState theme = themeable.getTheme(block.getTopThemeIndex(state));
+				if(!theme.isAir()) return theme;
 		}
 		
-		return origState;
+		return state;
 	}
 }

src/main/java/fr/adrien1106/reframed/mixin/particles/MixinLivingEntity.java

@@ -1,5 +1,7 @@
 package fr.adrien1106.reframed.mixin.particles;
 
+import com.llamalad7.mixinextras.sugar.Local;
+import fr.adrien1106.reframed.block.ReFramedBlock;
 import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.Entity;
@@ -7,33 +9,25 @@ import net.minecraft.entity.LivingEntity;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.ModifyArg;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
 @Mixin(LivingEntity.class)
 public class MixinLivingEntity {
-	@Unique private BlockPos lastFallCheckPos;
-	
-	@Inject(method = "fall", at = @At("HEAD"))
-	private void onFall(double d, boolean bl, BlockState blockState, BlockPos blockPos, CallbackInfo ci) {
-		lastFallCheckPos = blockPos;
-	}
 	
 	@ModifyArg(
 		method = "fall",
 		at = @At(value = "INVOKE", target = "Lnet/minecraft/particle/BlockStateParticleEffect;<init>(Lnet/minecraft/particle/ParticleType;Lnet/minecraft/block/BlockState;)V")
 	)
-	private BlockState modifyParticleState(BlockState origState) {
+	private BlockState modifyParticleState(BlockState state, @Local(ordinal = 0, argsOnly = true) BlockPos land_pos) {
 		World world = ((Entity) (Object) this).getWorld();
 		
-		if(lastFallCheckPos != null && world.getBlockEntity(lastFallCheckPos) instanceof ThemeableBlockEntity themeable) {
-			BlockState theme = themeable.getThemeState();
-			if(!theme.isAir()) return theme;
+		if(world.getBlockEntity(land_pos) instanceof ThemeableBlockEntity themeable
+			&& state.getBlock() instanceof ReFramedBlock block) {
+				BlockState theme = themeable.getTheme(block.getTopThemeIndex(state));
+				if(!theme.isAir()) return theme;
 		}
 		
-		return origState;
+		return state;
 	}
 }

src/main/java/fr/adrien1106/reframed/mixin/render/BlockRenderInfoMixin.java

@@ -1,25 +1,29 @@
-package fr.adrien1106.reframed.mixin;
+package fr.adrien1106.reframed.mixin.render;
 
 import com.llamalad7.mixinextras.sugar.Local;
-import fr.adrien1106.reframed.block.ReFramedEntity;
+import fr.adrien1106.reframed.block.ReFramedBlock;
+import fr.adrien1106.reframed.util.IBlockRenderInfoMixin;
+import fr.adrien1106.reframed.util.ThemeableBlockEntity;
 import net.fabricmc.fabric.impl.client.indigo.renderer.render.BlockRenderInfo;
-import net.minecraft.block.Block;
 import net.minecraft.block.BlockState;
 import net.minecraft.block.entity.BlockEntity;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Direction;
 import net.minecraft.world.BlockRenderView;
+import net.minecraft.world.BlockView;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.ModifyArg;
+import org.spongepowered.asm.mixin.injection.Redirect;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
 @Mixin(BlockRenderInfo.class)
-public abstract class BlockRenderInfoMixin {
+public abstract class BlockRenderInfoMixin implements IBlockRenderInfoMixin {
 
     @Shadow public BlockPos blockPos;
 
@@ -29,21 +33,38 @@ public abstract class BlockRenderInfoMixin {
 
     @Shadow @Final private BlockPos.Mutable searchPos;
 
+    @Shadow public abstract void prepareForBlock(BlockState blockState, BlockPos blockPos, boolean modelAo);
+
+    @Unique
+    private int theme_index = 1;
+
     @ModifyArg(method = "prepareForBlock",
         at = @At(value = "INVOKE", target = "Lnet/minecraft/client/render/RenderLayers;" +
             "getBlockLayer(Lnet/minecraft/block/BlockState;)Lnet/minecraft/client/render/RenderLayer;"))
     public BlockState prepareCamoLayer(BlockState state, @Local(argsOnly = true) BlockPos pos) {
         BlockEntity block_entity = MinecraftClient.getInstance().world.getBlockEntity(pos);
-        if (!(block_entity instanceof ReFramedEntity frame_entity)) return state;
-        return frame_entity.getThemeState();
+        if (!(block_entity instanceof ThemeableBlockEntity frame_entity)) return state;
+        return frame_entity.getTheme(theme_index);
     }
 
     @Inject(method = "shouldDrawFace",
         at = @At(value = "INVOKE_ASSIGN", target = "Lnet/minecraft/util/math/Direction;getId()I"),
         cancellable = true)
     private void shouldDrawCamoFace(Direction face, CallbackInfoReturnable<Boolean> cir) {
+        // early injection for camos themselves
         BlockEntity block_entity = MinecraftClient.getInstance().world.getBlockEntity(blockPos);
-        if (!(block_entity instanceof ReFramedEntity)) return;
-        cir.setReturnValue(Block.shouldDrawSide(blockState, blockView, blockPos, face, searchPos.set(blockPos, face)));
+        if (!(block_entity instanceof ThemeableBlockEntity)) return;
+        cir.setReturnValue(ReFramedBlock.shouldDrawSide(blockState, blockView, blockPos, face, searchPos.set(blockPos, face), theme_index));
+    }
+
+    @Redirect(method = "shouldDrawFace", at = @At(value = "INVOKE", target = "Lnet/minecraft/block/Block;shouldDrawSide(Lnet/minecraft/block/BlockState;Lnet/minecraft/world/BlockView;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/Direction;Lnet/minecraft/util/math/BlockPos;)Z"))
+    private boolean shouldDrawAdjacentCamoSide(BlockState state, BlockView world, BlockPos pos, Direction side, BlockPos other_pos) {
+        return ReFramedBlock.shouldDrawSide(state, world, pos, side, other_pos, theme_index);
+    }
+
+    @Override
+    public void prepareForBlock(BlockState state, BlockPos pos, boolean ao, int theme_index) {
+        this.theme_index = theme_index;
+        prepareForBlock(state, pos, ao);
     }
 }

src/main/java/fr/adrien1106/reframed/mixin/render/MultipartBakedModelMixin.java

@@ -0,0 +1,25 @@
+package fr.adrien1106.reframed.mixin.render;
+
+import fr.adrien1106.reframed.util.IMultipartBakedModelMixin;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.render.model.MultipartBakedModel;
+import org.apache.commons.lang3.tuple.Pair;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Predicate;
+
+@Mixin(MultipartBakedModel.class)
+public class MultipartBakedModelMixin implements IMultipartBakedModelMixin {
+
+    @Shadow @Final private List<Pair<Predicate<BlockState>, BakedModel>> components;
+
+    @Override
+    public BakedModel getModel(BlockState state) {
+        return components.stream().map(pair -> pair.getLeft().test(state) ? pair.getRight(): null).filter(Objects::nonNull).findAny().orElse(null);
+    }
+}

src/main/java/fr/adrien1106/reframed/mixin/render/TerrainRenderContextMixin.java

@@ -0,0 +1,41 @@
+package fr.adrien1106.reframed.mixin.render;
+
+import fr.adrien1106.reframed.client.model.MultiRetexturableModel;
+import fr.adrien1106.reframed.util.IBlockRenderInfoMixin;
+import fr.adrien1106.reframed.util.IMultipartBakedModelMixin;
+import net.fabricmc.fabric.impl.client.indigo.renderer.render.AbstractBlockRenderContext;
+import net.fabricmc.fabric.impl.client.indigo.renderer.render.TerrainRenderContext;
+import net.minecraft.block.BlockState;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.util.math.BlockPos;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.List;
+
+@Mixin(TerrainRenderContext.class)
+public abstract class TerrainRenderContextMixin extends AbstractBlockRenderContext {
+
+    @Inject(method = "tessellateBlock", at = @At(
+            value = "INVOKE",
+            target = "Lnet/fabricmc/fabric/impl/client/indigo/renderer/aocalc/AoCalculator;clear()V",
+            shift = At.Shift.AFTER
+        ), cancellable = true)
+    private void renderMultipleModels(BlockState state, BlockPos pos, BakedModel wrapper, MatrixStack matrixStack, CallbackInfo ci) {
+        if (!(wrapper instanceof IMultipartBakedModelMixin wrapped)
+            || !(wrapped.getModel(state) instanceof MultiRetexturableModel retexturing_model)) return;
+
+        List<BakedModel> models = retexturing_model.models();
+        int i = 0;
+        for (BakedModel bakedModel : models) {
+            i++;
+            aoCalc.clear();
+            ((IBlockRenderInfoMixin) blockInfo).prepareForBlock(state, pos, bakedModel.useAmbientOcclusion(), i);
+            bakedModel.emitBlockQuads(blockInfo.blockView, blockInfo.blockState, blockInfo.blockPos, blockInfo.randomSupplier, this);
+        }
+        ci.cancel();
+    }
+}

src/main/java/fr/adrien1106/reframed/mixin/render/WorldRendererMixin.java

@@ -0,0 +1,35 @@
+package fr.adrien1106.reframed.mixin.render;
+
+import fr.adrien1106.reframed.block.ReFramedDoubleBlock;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.ShapeContext;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.client.render.WorldRenderer;
+import net.minecraft.util.hit.BlockHitResult;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.shape.VoxelShape;
+import net.minecraft.world.BlockView;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(WorldRenderer.class)
+public class WorldRendererMixin {
+
+    @Shadow @Final private MinecraftClient client;
+
+    @Redirect(method = "drawBlockOutline",
+        at = @At(value = "INVOKE", target = "Lnet/minecraft/block/BlockState;" +
+            "getOutlineShape(" +
+                "Lnet/minecraft/world/BlockView;" +
+                "Lnet/minecraft/util/math/BlockPos;" +
+                "Lnet/minecraft/block/ShapeContext;" +
+            ")Lnet/minecraft/util/shape/VoxelShape;"))
+    private VoxelShape getRenderOutline(BlockState state, BlockView world, BlockPos pos, ShapeContext shape_context) {
+        if (state.getBlock() instanceof ReFramedDoubleBlock double_frame_block) // cast is already checked in render
+            return double_frame_block.getRenderOutline(state, (BlockHitResult) client.crosshairTarget);
+        return state.getOutlineShape(world, pos, shape_context);
+    }
+}

src/main/java/fr/adrien1106/reframed/util/IBlockRenderInfoMixin.java

@@ -0,0 +1,9 @@
+package fr.adrien1106.reframed.util;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.util.math.BlockPos;
+
+public interface IBlockRenderInfoMixin {
+
+    void prepareForBlock(BlockState state, BlockPos pos, boolean ao, int theme_index);
+}

src/main/java/fr/adrien1106/reframed/util/IMultipartBakedModelMixin.java

@@ -0,0 +1,9 @@
+package fr.adrien1106.reframed.util;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.client.render.model.BakedModel;
+
+public interface IMultipartBakedModelMixin {
+
+    BakedModel getModel(BlockState state);
+}

src/main/java/fr/adrien1106/reframed/util/ReFramedInteractionUtil.java

@@ -1,19 +1,10 @@
 package fr.adrien1106.reframed.util;
 
 import fr.adrien1106.reframed.block.ReFramedEntity;
-import net.minecraft.block.AbstractBlock;
-import net.minecraft.block.Block;
-import net.minecraft.block.BlockEntityProvider;
-import net.minecraft.block.BlockState;
-import net.minecraft.block.Blocks;
-import net.minecraft.block.ShapeContext;
+import net.minecraft.block.*;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.item.BlockItem;
-import net.minecraft.item.ItemPlacementContext;
-import net.minecraft.item.ItemStack;
-import net.minecraft.item.ItemUsageContext;
-import net.minecraft.item.Items;
+import net.minecraft.item.*;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.sound.BlockSoundGroup;
 import net.minecraft.sound.SoundCategory;
@@ -37,8 +28,10 @@ import org.jetbrains.annotations.Nullable;
 //For an example of how to use this class, have a look at TemplateBlock.
 //Basically there are several methods that would like to modify the return value of something.
 public class ReFramedInteractionUtil {
+	@Deprecated // TODO remove
 	public static final BooleanProperty LIGHT = BooleanProperty.of("frame_light");
-	
+
+	@Deprecated // TODO remove
 	public static StateManager.Builder<Block, BlockState> appendProperties(StateManager.Builder<Block, BlockState> builder) {
 		return builder.add(LIGHT);
 	}
@@ -46,79 +39,92 @@ public class ReFramedInteractionUtil {
 	//Use this to obtain a Block.Settings that'll make your Template act like the ones in the mod.
 	//(To complete the look, don't forget to tag your blocks with mineable/axe.)
 	private static final AbstractBlock.ContextPredicate NOPE = (blah, blahdey, blahh) -> false;
+
+	// TODO Find better place
 	public static AbstractBlock.Settings configureSettings(AbstractBlock.Settings s) {
 		return s.luminance(ReFramedInteractionUtil::luminance).nonOpaque().sounds(BlockSoundGroup.WOOD).hardness(0.2f).suffocates(NOPE).blockVision(NOPE);
 	}
-	
+
+
+	// TODO Find better place
 	//And if you don't have a Block.Settings to copy off of.
 	public static AbstractBlock.Settings makeSettings() {
 		return configureSettings(AbstractBlock.Settings.create());
 	}
-	
+
+	@Deprecated // TODO remove
 	public static BlockState setDefaultStates(BlockState in) {
 		if(in.contains(LIGHT)) in = in.with(LIGHT, false);
 		return in;
 	}
-	
+
+	@Deprecated // TODO remove
 	public static @Nullable BlockState modifyPlacementState(@Nullable BlockState in, ItemPlacementContext ctx) {
-		return ReFramedEntity.weirdNbtLightLevelStuff(in, ctx.getStack());
+		return ReFramedEntity.getNbtLightLevel(in, ctx.getStack());
 	}
-	
+
+	@Deprecated // TODO remove
 	public static ActionResult onUse(BlockState state, World world, BlockPos pos, PlayerEntity player, Hand hand, BlockHitResult hit) {
-		if(!(world.getBlockEntity(pos) instanceof ReFramedEntity be)) return ActionResult.PASS;
+		if(!(world.getBlockEntity(pos) instanceof ReFramedEntity block_entity)) return ActionResult.PASS;
 		if(!player.canModifyBlocks() || !world.canPlayerModifyAt(player, pos)) return ActionResult.PASS;
 		
 		ItemStack held = player.getStackInHand(hand);
 		ReframedInteractible ext = state.getBlock() instanceof ReframedInteractible e ? e : ReframedInteractible.Default.INSTANCE;
 
-		//Glowstone
-		if(state.contains(LIGHT) && held.getItem() == Items.GLOWSTONE_DUST && !state.get(LIGHT) && !be.hasSpentGlowstoneDust()) {
-			world.setBlockState(pos, state.with(LIGHT, true));
-			be.spentGlowstoneDust();
+		// frame will emit light if applied with glowstone
+		if(state.contains(LIGHT) && held.getItem() == Items.GLOWSTONE_DUST) {
+			block_entity.toggleLight();
+			world.setBlockState(pos, state.with(LIGHT, block_entity.emitsLight()));
 			
-			if(!player.isCreative()) held.decrement(1);
+			if(!player.isCreative())
+				if (block_entity.emitsLight()) held.decrement(1);
+				else held.increment(1);
 			world.playSound(player, pos, SoundEvents.BLOCK_GLASS_HIT, SoundCategory.BLOCKS, 1f, 1f);
 			return ActionResult.SUCCESS;
 		}
 		
-		//Redstone
-		if(held.getItem() == Blocks.REDSTONE_TORCH.asItem() &&
-			!be.emitsRedstone() &&
-			!be.hasSpentRedstoneTorch() &&
-			ext.canAddRedstoneEmission(state, world, pos)
-		) {
-			be.setEmitsRedstone(true);
-			be.spentRedstoneTorch();
+		// frame will emit redstone if applied with redstone torch can deactivate redstone block camo emission
+		if(held.getItem() == Items.REDSTONE_TORCH && ext.canAddRedstoneEmission(state, world, pos)) {
+			block_entity.toggleRedstone();
 			
-			if(!player.isCreative()) held.decrement(1);
+			if(!player.isCreative())
+                if (block_entity.emitsRedstone()) held.decrement(1);
+                else held.increment(1);
 			world.playSound(player, pos, SoundEvents.BLOCK_LEVER_CLICK, SoundCategory.BLOCKS, 1f, 1f);
 			return ActionResult.SUCCESS;
 		}
 		
-		//Popped chorus fruit
-		if(held.getItem() == Items.POPPED_CHORUS_FRUIT &&
-			be.isSolid() &&
-			!be.hasSpentPoppedChorus() &&
-			ext.canRemoveCollision(state, world, pos)
-		) {
-			be.setSolidity(false);
-			be.spentPoppedChorus();
+		// Frame will lose its collision if applied with popped chorus fruit
+		if(held.getItem() == Items.POPPED_CHORUS_FRUIT && ext.canRemoveCollision(state, world, pos)) {
+			block_entity.toggleSolidity();
 			
-			if(!player.isCreative()) held.decrement(1);
+			if(!player.isCreative())
+				if (!block_entity.isSolid()) held.decrement(1);
+				else held.increment(1);
 			world.playSound(player, pos, SoundEvents.ITEM_CHORUS_FRUIT_TELEPORT, SoundCategory.BLOCKS, 1f, 1f);
 			return ActionResult.SUCCESS;
 		}
 		
-		//Changing the theme
-		if(held.getItem() instanceof BlockItem bi && be.getThemeState().getBlock() == Blocks.AIR) {
-			Block block = bi.getBlock();
+		// Changing the theme
+		if(held.getItem() instanceof BlockItem block_item && block_entity.getTheme(1).getBlock() == Blocks.AIR) {
+			Block block = block_item.getBlock();
 			ItemPlacementContext ctx = new ItemPlacementContext(new ItemUsageContext(player, hand, hit));
 			BlockState placementState = block.getPlacementState(ctx);
 			if(placementState != null && Block.isShapeFullCube(placementState.getCollisionShape(world, pos)) && !(block instanceof BlockEntityProvider)) {
-				if(!world.isClient) be.setRenderedState(placementState);
-				
-				world.setBlockState(pos, state.with(LIGHT, be.hasSpentGlowstoneDust() || (placementState.getLuminance() != 0)));
-				be.setEmitsRedstone(be.hasSpentRedstoneTorch() || placementState.getWeakRedstonePower(world, pos, Direction.NORTH) != 0);
+				// TODO FOR SECOND
+				if(!world.isClient) block_entity.setTheme(placementState, 1);
+
+				// check for default light emission
+				if (placementState.getLuminance() > 0)
+					if (block_entity.emitsLight()) Block.dropStack(world, pos, new ItemStack(Items.GLOWSTONE_DUST));
+					else block_entity.toggleLight();
+
+				world.setBlockState(pos, state.with(LIGHT, block_entity.emitsLight()));
+
+				// check for redstone emission
+				if (placementState.getWeakRedstonePower(world, pos, Direction.NORTH) > 0)
+					if (block_entity.emitsRedstone()) Block.dropStack(world, pos, new ItemStack(Items.GLOWSTONE_DUST));
+					else block_entity.toggleRedstone();
 				
 				if(!player.isCreative()) held.decrement(1);
 				world.playSound(player, pos, placementState.getSoundGroup().getPlaceSound(), SoundCategory.BLOCKS, 1f, 1.1f);
@@ -128,27 +134,30 @@ public class ReFramedInteractionUtil {
 		
 		return ActionResult.PASS;
 	}
-	
-	//Maybe an odd spot to put this logic but it's consistent w/ vanilla chests, barrels, etc
+
+	@Deprecated
 	public static void onStateReplaced(BlockState state, World world, BlockPos pos, BlockState newState, boolean moved) {
 		if(!state.isOf(newState.getBlock()) &&
-			world.getBlockEntity(pos) instanceof ReFramedEntity frame &&
+			world.getBlockEntity(pos) instanceof ReFramedEntity frame_entity &&
 			world.getGameRules().getBoolean(GameRules.DO_TILE_DROPS)
 		) {
 			DefaultedList<ItemStack> drops = DefaultedList.of();
+
+			BlockState theme = frame_entity.getTheme(1);
+			if(theme.getBlock() != Blocks.AIR) drops.add(new ItemStack(theme.getBlock()));
 			
-			//TODO: remember the specific ItemStack
-			Block theme = frame.getThemeState().getBlock();
-			if(theme != Blocks.AIR) drops.add(new ItemStack(theme));
-			
-			if(frame.hasSpentRedstoneTorch()) drops.add(new ItemStack(Items.REDSTONE_TORCH));
-			if(frame.hasSpentGlowstoneDust()) drops.add(new ItemStack(Items.GLOWSTONE_DUST));
-			if(frame.hasSpentPoppedChorus()) drops.add(new ItemStack(Items.POPPED_CHORUS_FRUIT));
+			if(frame_entity.emitsRedstone() && theme.getWeakRedstonePower(world, pos, Direction.NORTH) == 0)
+				drops.add(new ItemStack(Items.REDSTONE_TORCH));
+			if(frame_entity.emitsLight() && theme.getLuminance() == 0)
+				drops.add(new ItemStack(Items.GLOWSTONE_DUST));
+			if(!frame_entity.isSolid() && theme.isSolid())
+				drops.add(new ItemStack(Items.POPPED_CHORUS_FRUIT));
 			
 			ItemScatterer.spawn(world, pos, drops);
 		}
 	}
-	
+
+	@Deprecated
 	public static void onPlaced(World world, BlockPos pos, BlockState state, @Nullable LivingEntity placer, ItemStack stack) {
 		//Load the BlockEntityTag clientside, which fixes the template briefly showing its default state when placing it.
 		//I'm surprised this doesn't happen by default; the BlockEntityTag stuff is only done serverside.
@@ -157,21 +166,25 @@ public class ReFramedInteractionUtil {
 			if(tag != null) be.readNbt(tag);
 		}
 	}
-	
+
+	@Deprecated
 	//Returns "null" to signal "no opinion". Imagine it like an InteractionResult.PASS.
 	public static @Nullable VoxelShape getCollisionShape(BlockState state, BlockView view, BlockPos pos, ShapeContext ctx) {
 		return view.getBlockEntity(pos) instanceof ReFramedEntity be && !be.isSolid() ? VoxelShapes.empty() : null;
 	}
-	
+
+	@Deprecated // TODO remove
 	public static boolean emitsRedstonePower(BlockState state) {
 		//return state.contains(REDSTONE) ? state.get(REDSTONE) : false;
 		return false; //TODO, not available after punting this to BlockEntity. Yarn makes this method sound more important than it is, it's just for dust redirection.
 	}
-	
+
+	@Deprecated // TODO remove
 	public static int getWeakRedstonePower(BlockState state, BlockView view, BlockPos pos, Direction dir) {
 		return view.getBlockEntity(pos) instanceof ReFramedEntity be && be.emitsRedstone() ? 15 : 0;
 	}
-	
+
+	@Deprecated // TODO remove
 	public static int getStrongRedstonePower(BlockState state, BlockView view, BlockPos pos, Direction dir) {
 		return view.getBlockEntity(pos) instanceof ReFramedEntity be && be.emitsRedstone() ? 15 : 0;
 	}

src/main/java/fr/adrien1106/reframed/util/ThemeableBlockEntity.java

@@ -1,10 +1,13 @@
 package fr.adrien1106.reframed.util;
 
-import net.fabricmc.fabric.api.rendering.data.v1.RenderAttachmentBlockEntity;
 import net.minecraft.block.BlockState;
 
-public interface ThemeableBlockEntity extends RenderAttachmentBlockEntity {
-	default BlockState getThemeState() {
-		return (BlockState) getRenderAttachmentData();
-	}
+import java.util.List;
+
+public interface ThemeableBlockEntity {
+	BlockState getTheme(int i);
+
+	void setTheme(BlockState state, int i);
+
+	List<BlockState> getThemes();
 }

src/main/resources/assets/reframed/blockstates/slab.json

@@ -1,65 +0,0 @@
-{
-	"multipart": [
-		{
-			"apply": {
-				"model": "reframed:slab_special",
-				"uvlock": true
-			},
-			"when": {
-				"facing": "down"
-			}
-		},
-		{
-			"apply": {
-				"model": "reframed:slab_special",
-				"uvlock": true,
-				"x": 180
-			},
-			"when": {
-				"facing": "up"
-			}
-		},
-		{
-			"apply": {
-				"model": "reframed:slab_special",
-				"uvlock": true,
-				"x": 270
-			},
-			"when": {
-				"facing": "north"
-			}
-		},
-		{
-			"apply": {
-				"model": "reframed:slab_special",
-				"uvlock": true,
-				"x": 90
-			},
-			"when": {
-				"facing": "south"
-			}
-		},
-		{
-			"apply": {
-				"model": "reframed:slab_special",
-				"uvlock": true,
-				"x": 90,
-				"y": 90
-			},
-			"when": {
-				"facing": "west"
-			}
-		},
-		{
-			"apply": {
-				"model": "reframed:slab_special",
-				"uvlock": true,
-				"x": 90,
-				"y": 270
-			},
-			"when": {
-				"facing": "east"
-			}
-		}
-	]
-}

src/main/resources/assets/reframed/models/block/double_outer_stairs_complement.json

@@ -0,0 +1,51 @@
+{
+	"credit": "Made with Blockbench",
+	"parent": "minecraft:block/block",
+	"textures": {
+		"particle": "#side"
+	},
+	"elements": [
+		{
+			"from": [8, 8, 0],
+			"to": [16, 16, 8],
+			"faces": {
+				"north": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "north"},
+				"east": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "east"},
+				"south": {"uv": [8, 0, 16, 8], "texture": "#side"},
+				"up": {"uv": [8, 0, 16, 8], "texture": "#top", "cullface": "up"},
+				"down": {"uv": [8, 8, 16, 16], "texture": "#bottom"}
+			}
+		},
+		{
+			"from": [0, 0, 0],
+			"to": [8, 8, 8],
+			"faces": {
+				"north": {"uv": [8, 8, 16, 16], "texture": "#side", "cullface": "north"},
+				"east": {"uv": [8, 8, 16, 16], "texture": "#side"},
+				"south": {"uv": [0, 8, 8, 16], "texture": "#side"},
+				"west": {"uv": [0, 8, 8, 16], "texture": "#side", "cullface": "west"},
+				"down": {"uv": [8, 0, 16, 8], "texture": "#bottom", "cullface": "down"}
+			}
+		},
+		{
+			"from": [0, 8, 0],
+			"to": [8, 16, 8],
+			"faces": {
+				"north": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "north"},
+				"west": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "west"},
+				"up": {"uv": [0, 0, 8, 8], "texture": "#top", "cullface": "up"}
+			}
+		},
+		{
+			"from": [0, 8, 8],
+			"to": [8, 16, 16],
+			"faces": {
+				"east": {"uv": [0, 0, 8, 8], "texture": "#side"},
+				"south": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "south"},
+				"west": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "west"},
+				"up": {"uv": [0, 8, 8, 16], "texture": "#top", "cullface": "up"},
+				"down": {"uv": [0, 0, 8, 8], "texture": "#bottom"}
+			}
+		}
+	]
+}

src/main/resources/assets/reframed/models/block/inner_stairs_complement.json

@@ -0,0 +1,20 @@
+{
+	"credit": "Made with Blockbench",
+	"textures": {
+		"particle": "#side"
+	},
+	"elements": [
+		{
+			"from": [0, 8, 0],
+			"to": [8, 16, 8],
+			"faces": {
+				"north": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "north"},
+				"east": {"uv": [8, 0, 16, 8], "texture": "#side"},
+				"south": {"uv": [0, 0, 8, 8], "texture": "#side"},
+				"west": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "west"},
+				"up": {"uv": [0, 0, 8, 8], "texture": "#top", "cullface": "up"},
+				"down": {"uv": [0, 8, 8, 16], "texture": "#bottom"}
+			}
+		}
+	]
+}

src/main/resources/assets/reframed/models/block/outer_side_stairs_complement.json

@@ -0,0 +1,48 @@
+{
+	"credit": "Made with Blockbench",
+	"textures": {
+		"particle": "#side"
+	},
+	"elements": [
+		{
+			"from": [0, 8, 0],
+			"to": [8, 16, 8],
+			"faces": {
+				"north": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "north"},
+				"east": {"uv": [8, 0, 16, 8], "texture": "#side"},
+				"west": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "west"},
+				"up": {"uv": [0, 0, 8, 8], "texture": "#top", "cullface": "up"}
+			}
+		},
+		{
+			"from": [0, 8, 8],
+			"to": [8, 16, 16],
+			"faces": {
+				"east": {"uv": [0, 0, 8, 8], "texture": "#side"},
+				"south": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "south"},
+				"west": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "west"},
+				"up": {"uv": [0, 8, 8, 16], "texture": "#top", "cullface": "up"},
+				"down": {"uv": [0, 0, 8, 8], "texture": "#bottom"}
+			}
+		},
+		{
+			"from": [0, 0, 0],
+			"to": [8, 8, 8],
+			"faces": {
+				"north": {"uv": [8, 8, 16, 16], "texture": "#side", "cullface": "north"},
+				"east": {"uv": [8, 8, 16, 16], "texture": "#side"},
+				"south": {"uv": [0, 8, 8, 16], "texture": "#side"},
+				"west": {"uv": [0, 8, 8, 16], "texture": "#side", "cullface": "west"},
+				"down": {"uv": [0, 8, 8, 16], "texture": "#bottom", "cullface": "down"}
+			}
+		}
+	],
+	"groups": [
+		{
+			"name": "outer_stairs",
+			"origin": [8, 8, 8],
+			"color": 0,
+			"children": [0, 1, 2]
+		}
+	]
+}

src/main/resources/assets/reframed/models/block/outer_stairs_complement.json

@@ -0,0 +1,40 @@
+{
+	"credit": "Made with Blockbench",
+	"textures": {
+		"particle": "#side"
+	},
+	"elements": [
+		{
+			"from": [0, 8, 8],
+			"to": [8, 16, 16],
+			"faces": {
+				"east": {"uv": [0, 0, 8, 8], "texture": "#side"},
+				"south": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "south"},
+				"west": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "west"},
+				"up": {"uv": [0, 8, 8, 16], "texture": "#top", "cullface": "up"},
+				"down": {"uv": [0, 0, 8, 8], "texture": "#bottom"}
+			}
+		},
+		{
+			"from": [8, 8, 0],
+			"to": [16, 16, 8],
+			"faces": {
+				"north": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "north"},
+				"east": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "east"},
+				"south": {"uv": [9, 0, 16, 8], "texture": "#side"},
+				"up": {"uv": [8, 0, 16, 8], "texture": "#top", "cullface": "up"},
+				"down": {"uv": [8, 8, 16, 16], "texture": "#bottom"}
+			}
+		},
+		{
+			"from": [0, 8, 0],
+			"to": [8, 16, 8],
+			"faces": {
+				"north": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "north"},
+				"west": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "west"},
+				"up": {"uv": [0, 0, 8, 8], "texture": "#top", "cullface": "up"},
+				"down": {"uv": [0, 8, 8, 16], "texture": "#bottom"}
+			}
+		}
+	]
+}

src/main/resources/assets/reframed/models/block/stairs_complement.json

@@ -0,0 +1,35 @@
+{
+	"credit": "Made with Blockbench",
+	"parent": "block/block",
+	"textures": {
+		"particle": "#side"
+	},
+	"elements": [
+		{
+			"from": [0, 8, 0],
+			"to": [8, 16, 16],
+			"faces": {
+				"north": {"uv": [8, 0, 16, 8], "texture": "#side", "cullface": "north"},
+				"east": {"uv": [0, 0, 16, 8], "texture": "#side"},
+				"south": {"uv": [0, 0, 8, 8], "texture": "#side", "cullface": "south"},
+				"west": {"uv": [0, 8, 16, 16], "texture": "#side", "cullface": "west"},
+				"up": {"uv": [0, 0, 8, 16], "texture": "#top", "cullface": "up"},
+				"down": {"uv": [0, 0, 8, 16], "texture": "#bottom"}
+			}
+		}
+	],
+	"display": {
+		"thirdperson_lefthand": {
+			"rotation": [75, -135, 0],
+			"translation": [0, 2.5, 0],
+			"scale": [0.375, 0.375, 0.375]
+		},
+		"gui": {
+			"rotation": [30, 135, 0],
+			"scale": [0.625, 0.625, 0.625]
+		},
+		"head": {
+			"rotation": [0, -90, 0]
+		}
+	}
+}

src/main/resources/reframed.mixins.json

@@ -9,16 +9,18 @@
     "particles.MixinLivingEntity"
   ],
   "client": [
-    "BlockMixin",
-    "BlockRenderInfoMixin",
     "MinecraftAccessor",
     "compat.AthenaBakedModelMixin",
-    "compat.AthenaWrappedGetterMixin",
     "compat.AthenaConnectedBlockModelMixin",
+    "compat.AthenaWrappedGetterMixin",
     "model.WeightedBakedModelAccessor",
     "particles.AccessorParticle",
     "particles.AccessorSpriteBillboardParticle",
-    "particles.MixinBlockDustParticle"
+    "particles.MixinBlockDustParticle",
+    "render.BlockRenderInfoMixin",
+    "render.MultipartBakedModelMixin",
+    "render.TerrainRenderContextMixin",
+    "render.WorldRendererMixin"
   ],
   "injectors": {
     "defaultRequire": 1