diff --git a/src/main/java/ru/betterend/registry/StructureRegistry.java b/src/main/java/ru/betterend/registry/StructureRegistry.java
new file mode 100644
index 00000000..c555fb85
--- /dev/null
+++ b/src/main/java/ru/betterend/registry/StructureRegistry.java
@@ -0,0 +1,14 @@
+package ru.betterend.registry;
+
+import net.minecraft.structure.StructurePieceType;
+import net.minecraft.util.registry.Registry;
+import ru.betterend.BetterEnd;
+import ru.betterend.world.structures.piece.VoxelPiece;
+
+public class StructureRegistry {
+	public static final StructurePieceType VOXEL_PIECE = register("sdf", VoxelPiece::new);
+	
+	private static StructurePieceType register(String id, StructurePieceType pieceType) {
+		return Registry.register(Registry.STRUCTURE_PIECE, BetterEnd.makeID(id), pieceType);
+	}
+}
diff --git a/src/main/java/ru/betterend/util/sdf/primitive/SDFPrimitive.java b/src/main/java/ru/betterend/util/sdf/primitive/SDFPrimitive.java
index 707c8d0b..5f8cf461 100644
--- a/src/main/java/ru/betterend/util/sdf/primitive/SDFPrimitive.java
+++ b/src/main/java/ru/betterend/util/sdf/primitive/SDFPrimitive.java
@@ -32,4 +32,8 @@ public abstract class SDFPrimitive extends SDF {
 	public BlockState getBlockState(BlockPos pos) {
 		return placerFunction.apply(pos);
 	}
+	
+	/*public abstract CompoundTag toNBT(CompoundTag root) {
+		
+	}*/
 }
diff --git a/src/main/java/ru/betterend/world/features/MossyGlowshroomFeature.java b/src/main/java/ru/betterend/world/features/MossyGlowshroomFeature.java
index 85364689..3f64ce72 100644
--- a/src/main/java/ru/betterend/world/features/MossyGlowshroomFeature.java
+++ b/src/main/java/ru/betterend/world/features/MossyGlowshroomFeature.java
@@ -78,6 +78,10 @@ public class MossyGlowshroomFeature extends DefaultFeature {
 		Vector3f pos = spline.get(spline.size() - 1);
 		float scale = MHelper.randRange(0.75F, 1.1F, random);
 		
+		if (featureConfig != null && random.nextInt(32) == 0) {
+			scale *= MHelper.randRange(2F, 3F, random);
+		}
+		
 		Vector3f vec = spline.get(0);
 		float x1 = blockPos.getX() + vec.getX() * scale;
 		float y1 = blockPos.getY() + vec.getY() * scale;
diff --git a/src/main/java/ru/betterend/world/structures/piece/BasePiece.java b/src/main/java/ru/betterend/world/structures/piece/BasePiece.java
new file mode 100644
index 00000000..aa8fe1a4
--- /dev/null
+++ b/src/main/java/ru/betterend/world/structures/piece/BasePiece.java
@@ -0,0 +1,18 @@
+package ru.betterend.world.structures.piece;
+
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.structure.StructurePiece;
+import net.minecraft.structure.StructurePieceType;
+
+public abstract class BasePiece extends StructurePiece {
+	protected BasePiece(StructurePieceType type, int i) {
+		super(type, i);
+	}
+
+	protected BasePiece(StructurePieceType type, CompoundTag tag) {
+		super(type, tag);
+		fromNbt(tag);
+	}
+	
+	protected abstract void fromNbt(CompoundTag tag);
+}
\ No newline at end of file
diff --git a/src/main/java/ru/betterend/world/structures/piece/StructureWorld.java b/src/main/java/ru/betterend/world/structures/piece/StructureWorld.java
new file mode 100644
index 00000000..ab9f9942
--- /dev/null
+++ b/src/main/java/ru/betterend/world/structures/piece/StructureWorld.java
@@ -0,0 +1,126 @@
+package ru.betterend.world.structures.piece;
+
+import java.util.Map;
+
+import com.google.common.collect.Maps;
+
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.nbt.NbtHelper;
+import net.minecraft.util.math.BlockBox;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.ChunkPos;
+import net.minecraft.world.StructureWorldAccess;
+import net.minecraft.world.chunk.Chunk;
+
+public class StructureWorld {
+	private Map<ChunkPos, Part> parts = Maps.newHashMap();
+	private int minX = Integer.MAX_VALUE;
+	private int minZ = Integer.MAX_VALUE;
+	private int maxX = Integer.MIN_VALUE;
+	private int maxZ = Integer.MIN_VALUE;
+	
+	public StructureWorld() {}
+	
+	public StructureWorld(CompoundTag tag) {
+		minX = tag.getInt("minX");
+		maxX = tag.getInt("maxX");
+		minZ = tag.getInt("minZ");
+		maxZ = tag.getInt("maxZ");
+		ListTag map = tag.getList("parts", 10);
+		map.forEach((element) -> {
+			CompoundTag compound = (CompoundTag) element;
+			Part part = new Part(compound);
+			int x = compound.getInt("x");
+			int z = compound.getInt("z");
+			parts.put(new ChunkPos(x, z), part);
+		});
+	}
+	
+	public void setBlock(BlockPos pos, BlockState state) {
+		ChunkPos cPos = new ChunkPos(pos);
+		Part part = parts.get(cPos);
+		if (part == null) {
+			part = new Part();
+			parts.put(cPos, part);
+			
+			if (cPos.x < minX) minX = cPos.x;
+			if (cPos.x > maxX) maxX = cPos.x;
+			if (cPos.z < minZ) minZ = cPos.z;
+			if (cPos.z > maxZ) maxZ = cPos.z;
+		}
+		part.addBlock(pos, state);
+	}
+	
+	public boolean placeChunk(StructureWorldAccess world, ChunkPos chunkPos) {
+		Part part = parts.get(chunkPos);
+		if (part != null) {
+			Chunk chunk = world.getChunk(chunkPos.x, chunkPos.z);
+			part.placeChunk(chunk);
+			return true;
+		}
+		return false;
+	}
+	
+	public CompoundTag toBNT() {
+		CompoundTag tag = new CompoundTag();
+		tag.putInt("minX", minX);
+		tag.putInt("maxX", maxX);
+		tag.putInt("minZ", minZ);
+		tag.putInt("maxZ", maxZ);
+		ListTag map = new ListTag();
+		tag.put("parts", map);
+		parts.forEach((pos, part) -> {
+			map.add(part.toNBT(pos.x, pos.z));
+		});
+		return tag;
+	}
+	
+	public BlockBox getBounds() {
+		return new BlockBox(minX << 4, minZ << 4, (maxX << 4) | 15, (maxZ << 4) | 15);
+	}
+	
+	private static final class Part {
+		Map<BlockPos, BlockState> blocks = Maps.newHashMap();
+		
+		public Part() {}
+		
+		public Part(CompoundTag tag) {
+			ListTag map = tag.getList("blocks", 10);
+			map.forEach((element) -> {
+				CompoundTag block = (CompoundTag) element;
+				BlockPos pos = NbtHelper.toBlockPos(block.getCompound("pos"));
+				BlockState state = Block.getStateFromRawId(block.getInt("state"));
+				blocks.put(pos, state);
+			});
+		}
+		
+		void addBlock(BlockPos pos, BlockState state) {
+			BlockPos inner = new BlockPos(pos.getX() & 15, pos.getY(), pos.getZ() & 15);
+			blocks.put(inner, state);
+		}
+		
+		void placeChunk(Chunk chunk) {
+			blocks.forEach((pos, state) -> {
+				chunk.setBlockState(pos, state, false);
+			});
+		}
+		
+		CompoundTag toNBT(int x, int z) {
+			CompoundTag tag = new CompoundTag();
+			tag.putInt("x", x);
+			tag.putInt("z", z);
+			ListTag map = new ListTag();
+			tag.put("blocks", map);
+			blocks.forEach((pos, state) -> {
+				CompoundTag block = new CompoundTag();
+				block.put("pos", NbtHelper.fromBlockPos(pos));
+				block.putInt("state", Block.getRawIdFromState(state));
+				map.add(block);
+			});
+			return tag;
+		}
+	}
+}
diff --git a/src/main/java/ru/betterend/world/structures/piece/VoxelPiece.java b/src/main/java/ru/betterend/world/structures/piece/VoxelPiece.java
new file mode 100644
index 00000000..4216c710
--- /dev/null
+++ b/src/main/java/ru/betterend/world/structures/piece/VoxelPiece.java
@@ -0,0 +1,43 @@
+package ru.betterend.world.structures.piece;
+
+import java.util.Random;
+import java.util.function.Consumer;
+
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.structure.StructureManager;
+import net.minecraft.util.math.BlockBox;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.ChunkPos;
+import net.minecraft.world.StructureWorldAccess;
+import net.minecraft.world.gen.StructureAccessor;
+import net.minecraft.world.gen.chunk.ChunkGenerator;
+import ru.betterend.registry.StructureRegistry;
+
+public class VoxelPiece extends BasePiece {
+	private StructureWorld world;
+	
+	public VoxelPiece(Consumer<StructureWorld> function, int id) {
+		super(StructureRegistry.VOXEL_PIECE, id);
+		world = new StructureWorld();
+		function.accept(world);
+		this.boundingBox = world.getBounds();
+	}
+
+	public VoxelPiece(StructureManager manager, CompoundTag tag) {
+		super(StructureRegistry.VOXEL_PIECE, tag);
+	}
+
+	@Override
+	protected void toNbt(CompoundTag tag) {
+		tag.put("world", world.toBNT());
+	}
+
+	protected void fromNbt(CompoundTag tag) {
+		world = new StructureWorld(tag.getCompound("world"));
+	}
+
+	@Override
+	public boolean generate(StructureWorldAccess world, StructureAccessor arg, ChunkGenerator chunkGenerator, Random random, BlockBox blockBox, ChunkPos chunkPos, BlockPos blockPos) {
+		return true;
+	}
+}