Merge branch 'main' of https://github.com/IntellectualSites/FastAsyncWorldEdit into main

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java

@@ -301,6 +301,9 @@ public class BukkitWorld extends AbstractWorld {
     public boolean generateTree(TreeGenerator.TreeType type, EditSession editSession, BlockVector3 pt) {
         World world = getWorld();
         TreeType bukkitType = toBukkitTreeType(type);
+        if (bukkitType == TreeType.CHORUS_PLANT) {
+            pt = pt.add(0, 1, 0); // bukkit skips the feature gen which does this offset normally, so we have to add it back
+        }
         return type != null && world.generateTree(BukkitAdapter.adapt(world, pt), bukkitType,
                 new EditSessionBlockChangeDelegate(editSession));
     }

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/blocks/CharBlocks.java

@@ -115,6 +115,9 @@ public abstract class CharBlocks implements IBlocks {
     public char get(int x, @Range(from = 0, to = 255) int y, int z) {
         final int layer = y >> 4;
         final int index = (y & 15) << 8 | z << 4 | x;
+        if (layer >= sections.length || layer < 0) {
+            return 0;
+        }
         return sections[layer].get(this, layer, index);
     }
 

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/blocks/CharSetBlocks.java

@@ -57,7 +57,7 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
         if (biomes == null) {
             return null;
         }
-        return biomes[(y >> 2) << 4 | (z & 3) << 2 | x & 3];
+        return biomes[(y >> 2) << 4 | (z >> 2) << 2 | x >> 2];
     }
 
     @Override
@@ -90,7 +90,7 @@ public class CharSetBlocks extends CharBlocks implements IChunkSet {
         if (biomes == null) {
             biomes = new BiomeType[1024];
         }
-        biomes[(y >> 2) << 4 | (z & 3) << 2 | x & 3] = biome;
+        biomes[(y >> 2) << 4 | (z >> 2) << 2 | x >> 2] = biome;
         return true;
     }
 

worldedit-core/src/main/java/com/boydti/fawe/jnbt/anvil/MCAChunk.java

@@ -481,7 +481,7 @@ public class MCAChunk implements IChunk {
 
     @Override
     public BiomeType getBiomeType(int x, int y, int z) {
-        return this.biomes[(y >> 2) << 4 | (z & 3) << 2 | x & 3];
+        return this.biomes[(y >> 2) << 4 | (z >> 2) << 2 | x >> 2];
     }
 
     @Override
@@ -505,7 +505,7 @@ public class MCAChunk implements IChunk {
     @Override
     public boolean setBiome(int x, int y, int z, BiomeType biome) {
         setModified();
-        biomes[(y >> 2) << 4 | (z & 3) << 2 | x & 3] = biome;
+        biomes[(y >> 2) << 4 | (z >> 2) << 2 | x >> 2] = biome;
         return true;
     }
 

worldedit-core/src/main/java/com/boydti/fawe/object/changeset/AbstractChangeSet.java

@@ -137,7 +137,10 @@ public abstract class AbstractChangeSet implements ChangeSet, IBatchProcessor {
         }
         if (!tilesTo.isEmpty()) {
             for (Map.Entry<BlockVector3, CompoundTag> entry : tilesTo.entrySet()) {
-                addTileCreate(entry.getValue());
+                CompoundTag nbt = entry.getValue();
+                BlockVector3 pos = entry.getKey();
+                MainUtil.setPosition(nbt, pos.getX() + bx, pos.getY(), pos.getZ() + bz);
+                addTileCreate(nbt);
             }
         }
         Set<UUID> entRemoves = set.getEntityRemoves();

worldedit-core/src/main/java/com/boydti/fawe/wrappers/AsyncPlayer.java

@@ -143,23 +143,27 @@ public class AsyncPlayer extends PlayerProxy {
 
     @Override
     public void floatAt(int x, int y, int z, boolean alwaysGlass) {
-        RuntimeException caught = null;
+        if (alwaysGlass || !isAllowedToFly()) {
-        try {
+            RuntimeException caught = null;
-            EditSession edit = new EditSessionBuilder(WorldWrapper.unwrap(getWorld()))
+            try {
-                .player(unwrap(getBasePlayer())).build();
+                EditSession edit =
-            edit.setBlock(BlockVector3.at(x, y - 1, z), BlockTypes.GLASS);
+                    new EditSessionBuilder(WorldWrapper.unwrap(getWorld())).player(unwrap(getBasePlayer())).build();
-            edit.flushQueue();
+                edit.setBlock(BlockVector3.at(x, y - 1, z), BlockTypes.GLASS);
-            LocalSession session = Fawe.get().getWorldEdit().getSessionManager().get(this);
+                edit.flushQueue();
-            if (session != null) {
+                LocalSession session = Fawe.get().getWorldEdit().getSessionManager().get(this);
-                session.remember(edit, true, getBasePlayer().getLimit().MAX_HISTORY);
+                if (session != null) {
+                    session.remember(edit, true, getBasePlayer().getLimit().MAX_HISTORY);
+                }
+            } catch (RuntimeException e) {
+                caught = e;
             }
-        } catch (RuntimeException e) {
+            if (caught != null) {
-            caught = e;
+                throw caught;
-        }
+            }
-        setPosition(Vector3.at(x + 0.5, y, z + 0.5));
+        } else {
-        if (caught != null) {
+            setFlying(true);
-            throw caught;
         }
+        trySetPosition(Vector3.at(x + 0.5, y, z + 0.5));
     }
 
     @Override

worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java

@@ -57,6 +57,7 @@ import com.sk89q.worldedit.function.GroundFunction;
 import com.sk89q.worldedit.function.RegionFunction;
 import com.sk89q.worldedit.function.block.BlockReplace;
 import com.sk89q.worldedit.function.block.Naturalizer;
+import com.sk89q.worldedit.function.block.SnowSimulator;
 import com.sk89q.worldedit.function.generator.ForestGenerator;
 import com.sk89q.worldedit.function.generator.GardenPatchGenerator;
 import com.sk89q.worldedit.function.mask.BlockStateMask;
@@ -97,6 +98,7 @@ import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.math.MathUtils;
 import com.sk89q.worldedit.math.MutableBlockVector2;
 import com.sk89q.worldedit.math.MutableBlockVector3;
+import com.sk89q.worldedit.math.Vector2;
 import com.sk89q.worldedit.math.Vector3;
 import com.sk89q.worldedit.math.interpolation.Interpolation;
 import com.sk89q.worldedit.math.interpolation.KochanekBartelsInterpolation;
@@ -104,6 +106,7 @@ import com.sk89q.worldedit.math.interpolation.Node;
 import com.sk89q.worldedit.math.noise.RandomNoise;
 import com.sk89q.worldedit.math.transform.AffineTransform;
 import com.sk89q.worldedit.regions.CuboidRegion;
+import com.sk89q.worldedit.regions.CylinderRegion;
 import com.sk89q.worldedit.regions.EllipsoidRegion;
 import com.sk89q.worldedit.regions.FlatRegion;
 import com.sk89q.worldedit.regions.Region;
@@ -148,6 +151,7 @@ import java.util.UUID;
 
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkNotNull;
+import static com.sk89q.worldedit.function.block.SnowSimulator.snowy;
 import static com.sk89q.worldedit.regions.Regions.asFlatRegion;
 import static com.sk89q.worldedit.regions.Regions.maximumBlockY;
 import static com.sk89q.worldedit.regions.Regions.minimumBlockY;
@@ -2150,9 +2154,25 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
      * @param radius the radius
      * @return number of blocks affected
      * @throws MaxChangedBlocksException thrown if too many blocks are changed
+     * @deprecated Use {@link #thaw(BlockVector3, double, int)}.
      */
     @Deprecated
     public int thaw(BlockVector3 position, double radius)
+        throws MaxChangedBlocksException {
+        return thaw(position, radius,
+            WorldEdit.getInstance().getConfiguration().defaultVerticalHeight);
+    }
+
+    /**
+     * Thaw blocks in a cylinder.
+     *
+     * @param position the position
+     * @param radius the radius
+     * @param height the height (upwards and downwards)
+     * @return number of blocks affected
+     * @throws MaxChangedBlocksException thrown if too many blocks are changed
+     */
+    public int thaw(BlockVector3 position, double radius, int height)
         throws MaxChangedBlocksException {
         int affected = 0;
         double radiusSq = radius * radius;
@@ -2164,6 +2184,10 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
         BlockState air = BlockTypes.AIR.getDefaultState();
         BlockState water = BlockTypes.WATER.getDefaultState();
 
+        int centerY = Math.max(getWorld().getMinY(), Math.min(getWorld().getMaxY(), oy));
+        int minY = Math.max(getWorld().getMinY(), centerY - height);
+        int maxY = Math.min(getWorld().getMaxY(), centerY + height);
+
         int ceilRadius = (int) Math.ceil(radius);
         for (int x = ox - ceilRadius; x <= ox + ceilRadius; ++x) {
             for (int z = oz - ceilRadius; z <= oz + ceilRadius; ++z) {
@@ -2171,15 +2195,25 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
                     continue;
                 }
 
-                for (int y = maxY; y >= 1; --y) {
+                for (int y = maxY; y > minY; --y) {
-                    BlockType id = getBlock(x, y, z).getBlockType();
+                    BlockVector3 pt = BlockVector3.at(x, y, z);
+                    BlockVector3 below = BlockVector3.at(x, y - 1, z);
+                    BlockType id = getBlock(pt).getBlockType();
 
                     if (id == BlockTypes.ICE) {
-                        if (setBlock(x, y, z, water)) {
+                        if (setBlock(pt, water)) {
                             ++affected;
                         }
                     } else if (id == BlockTypes.SNOW) {
-                        if (setBlock(x, y, z, air)) {
+                        if (setBlock(pt, air)) {
+                            if (y > 0 ) {
+                                BlockState block = getBlock(below);
+                                if (block.getStates().containsKey(snowy)) {
+                                    if (setBlock(below, block.with(snowy, false))) {
+                                        affected++;
+                                    }
+                                }
+                            }
                             ++affected;
                         }
                     } else if (id.getMaterial().isAir()) {
@@ -2191,7 +2225,7 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
             }
         }
 
-        return changes = affected;
+        return affected;
     }
 
     /**
@@ -2201,67 +2235,46 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
      * @param radius a radius
      * @return number of blocks affected
      * @throws MaxChangedBlocksException thrown if too many blocks are changed
+     * @deprecated Use {@link #simulateSnow(BlockVector3, double, int)}.
      */
     @Deprecated
     public int simulateSnow(BlockVector3 position, double radius) throws MaxChangedBlocksException {
-        int affected = 0;
+        return simulateSnow(position, radius,
-        double radiusSq = radius * radius;
+            WorldEdit.getInstance().getConfiguration().defaultVerticalHeight);
-
-        int ox = position.getBlockX();
-        int oy = position.getBlockY();
-        int oz = position.getBlockZ();
-
-        BlockState ice = BlockTypes.ICE.getDefaultState();
-        BlockState snow = BlockTypes.SNOW.getDefaultState();
-
-        int ceilRadius = (int) Math.ceil(radius);
-        for (int x = ox - ceilRadius; x <= ox + ceilRadius; ++x) {
-            for (int z = oz - ceilRadius; z <= oz + ceilRadius; ++z) {
-                if ((BlockVector3.at(x, oy, z)).distanceSq(position) > radiusSq) {
-                    continue;
-                }
-
-                for (int y = maxY; y >= 1; --y) {
-                    BlockVector3 pt = BlockVector3.at(x, y, z);
-                    BlockType id = getBlock(pt).getBlockType();
-
-                    if (id.getMaterial().isAir()) {
-                        continue;
-                    }
-
-                    // Ice!
-                    if (id == BlockTypes.WATER) {
-                        if (setBlock(pt, ice)) {
-                            ++affected;
-                        }
-                        break;
-                    }
-
-                    // Snow should not cover these blocks
-                    if (id.getMaterial().isTranslucent()) {
-                        // Add snow on leaves
-                        if (!BlockCategories.LEAVES.contains(id)) {
-                            break;
-                        }
-                    }
-
-                    // Too high?
-                    if (y == maxY) {
-                        break;
-                    }
-
-                    // add snow cover
-                    if (setBlock(pt.add(0, 1, 0), snow)) {
-                        ++affected;
-                    }
-                    break;
-                }
-            }
-        }
-
-        return changes = affected;
     }
 
+    /**
+     * Make snow in a cylinder.
+     *
+     * @param position a position
+     * @param radius a radius
+     * @param height the height (upwards and downwards)
+     * @return number of blocks affected
+     * @throws MaxChangedBlocksException thrown if too many blocks are changed
+     */
+    public int simulateSnow(BlockVector3 position, double radius, int height)
+        throws MaxChangedBlocksException {
+
+        return simulateSnow(new CylinderRegion(position, Vector2.at(radius, radius), position.getBlockY(), height), false);
+    }
+
+    /**
+     * Make snow in a region.
+     *
+     * @param region the region to simulate snow in
+     * @param stack whether it should stack existing snow
+     * @return number of blocks affected
+     * @throws MaxChangedBlocksException thrown if too many blocks are changed
+     */
+    public int simulateSnow(FlatRegion region, boolean stack)
+        throws MaxChangedBlocksException {
+        checkNotNull(region);
+
+        SnowSimulator snowSimulator = new SnowSimulator(this, stack);
+        LayerVisitor layerVisitor = new LayerVisitor(region, region.getMinimumY(), region.getMaximumY(), snowSimulator);
+        Operations.completeLegacy(layerVisitor);
+        return snowSimulator.getAffected();
+    }
     /**
      * Make dirt green.
      *
@@ -2270,52 +2283,67 @@ public class EditSession extends PassthroughExtent implements AutoCloseable {
      * @param onlyNormalDirt only affect normal dirt (all default properties)
      * @return number of blocks affected
      * @throws MaxChangedBlocksException thrown if too many blocks are changed
+     * @deprecated Use {@link #green(BlockVector3, double, int, boolean)}.
      */
     @Deprecated
     public int green(BlockVector3 position, double radius, boolean onlyNormalDirt)
         throws MaxChangedBlocksException {
+        return green(position, radius,
+            WorldEdit.getInstance().getConfiguration().defaultVerticalHeight, onlyNormalDirt);
+    }
+
+    /**
+     * Make dirt green in a cylinder.
+     *
+     * @param position the position
+     * @param radius the radius
+     * @param height the height
+     * @param onlyNormalDirt only affect normal dirt (all default properties)
+     * @return number of blocks affected
+     * @throws MaxChangedBlocksException thrown if too many blocks are changed
+     */
+    public int green(BlockVector3 position, double radius, int height, boolean onlyNormalDirt)
+        throws MaxChangedBlocksException {
+        int affected = 0;
         final double radiusSq = radius * radius;
 
         final int ox = position.getBlockX();
+        final int oy = position.getBlockY();
         final int oz = position.getBlockZ();
 
         final BlockState grass = BlockTypes.GRASS_BLOCK.getDefaultState();
 
+        final int centerY = Math.max(getWorld().getMinY(), Math.min(getWorld().getMaxY(), oy));
+        final int minY = Math.max(getWorld().getMinY(), centerY - height);
+        final int maxY = Math.min(getWorld().getMaxY(), centerY + height);
+
         final int ceilRadius = (int) Math.ceil(radius);
         for (int x = ox - ceilRadius; x <= ox + ceilRadius; ++x) {
-            int dx = x - ox;
-            int dx2 = dx * dx;
             for (int z = oz - ceilRadius; z <= oz + ceilRadius; ++z) {
-                int dz = z - oz;
+                if ((BlockVector3.at(x, oy, z)).distanceSq(position) > radiusSq) {
-                int dz2 = dz * dz;
-                if (dx2 + dz2 > radiusSq) {
                     continue;
                 }
-                loop:
+
-                for (int y = maxY; y >= 1; --y) {
+                for (int y = maxY; y > minY; --y) {
-                    final BlockType block = getBlockType(x, y, z);
+                    final BlockVector3 pt = BlockVector3.at(x, y, z);
-                    switch (block.getInternalId()) {
+                    final BlockState block = getBlock(pt);
-                        case BlockID.COARSE_DIRT:
+
-                            if (onlyNormalDirt) {
+                    if (block.getBlockType() == BlockTypes.DIRT
-                                break loop;
+                        || (!onlyNormalDirt && block.getBlockType() == BlockTypes.COARSE_DIRT)) {
-                            }
+                        if (setBlock(pt, grass)) {
-                            this.setBlock(x, y, z, grass);
+                            ++affected;
-                            break loop;
+                        }
-                        case BlockID.DIRT:
+                        break;
-                            this.setBlock(x, y, z, grass);
+                    } else if (block.getBlockType() == BlockTypes.WATER || block.getBlockType() == BlockTypes.LAVA) {
-                            break loop;
+                        break;
-                        case BlockID.WATER:
+                    } else if (block.getBlockType().getMaterial().isMovementBlocker()) {
-                        case BlockID.LAVA:
+                        break;
-                        default:
-                            if (block.getMaterial().isMovementBlocker()) {
-                                break loop;
-                            }
                     }
                 }
             }
         }
 
-        return changes;
+        return affected;
     }
 
     /**

worldedit-core/src/main/java/com/sk89q/worldedit/command/UtilityCommands.java

@@ -34,6 +34,7 @@ import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.command.argument.HeightConverter;
 import com.sk89q.worldedit.command.util.CommandPermissions;
 import com.sk89q.worldedit.command.util.CommandPermissionsConditionGenerator;
 import com.sk89q.worldedit.command.util.CreatureButcher;
@@ -54,10 +55,12 @@ import com.sk89q.worldedit.function.operation.Operations;
 import com.sk89q.worldedit.function.pattern.Pattern;
 import com.sk89q.worldedit.function.visitor.EntityVisitor;
 import com.sk89q.worldedit.internal.annotation.Direction;
+import com.sk89q.worldedit.internal.annotation.VertHeight;
 import com.sk89q.worldedit.internal.expression.EvaluationException;
 import com.sk89q.worldedit.internal.expression.Expression;
 import com.sk89q.worldedit.internal.expression.ExpressionException;
 import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.math.Vector2;
 import com.sk89q.worldedit.regions.CuboidRegion;
 import com.sk89q.worldedit.regions.CylinderRegion;
 import com.sk89q.worldedit.regions.Region;
@@ -464,6 +467,7 @@ public class UtilityCommands {
         return affected;
     }
 
+
     @Command(
         name = "snow",
         aliases = { "/snow" },
@@ -472,13 +476,27 @@ public class UtilityCommands {
     @CommandPermissions("worldedit.snow")
     @Logging(PLACEMENT)
     public int snow(Actor actor, LocalSession session, EditSession editSession,
-                    @Arg(desc = "The radius of the circle to snow in", def = "10")
+                    @Arg(desc = "The radius of the cylinder to snow in", def = "10")
-                        double size) throws WorldEditException {
+                        double size,
+                    @Arg(
+                        desc = "The height of the cylinder to snow in",
+                        def = HeightConverter.DEFAULT_VALUE
+                    )
+                    @VertHeight
+                        int height,
+                    @Switch(name = 's', desc = "Stack snow layers")
+                        boolean stack) throws WorldEditException {
         size = Math.max(1, size);
+        height = Math.max(1, height);
         we.checkMaxRadius(size);
 
-        int affected = editSession.simulateSnow(session.getPlacementPosition(actor), size);
+        BlockVector3 position = session.getPlacementPosition(actor);
-        actor.printInfo(TranslatableComponent.of("worldedit.snow.created", TextComponent.of(affected)));
+
+        CylinderRegion region = new CylinderRegion(position, Vector2.at(size, size), position.getBlockY() - height, position.getBlockY() + height);
+        int affected = editSession.simulateSnow(region, stack);
+        actor.printInfo(TranslatableComponent.of(
+            "worldedit.snow.created", TextComponent.of(affected)
+        ));
         return affected;
     }
 
@@ -490,13 +508,22 @@ public class UtilityCommands {
     @CommandPermissions("worldedit.thaw")
     @Logging(PLACEMENT)
     public int thaw(Actor actor, LocalSession session, EditSession editSession,
-                    @Arg(desc = "The radius of the circle to thaw in", def = "10")
+                    @Arg(desc = "The radius of the cylinder to thaw in", def = "10")
-                        double size) throws WorldEditException {
+                        double size,
+                    @Arg(
+                        desc = "The height of the cylinder to thaw in",
+                        def = HeightConverter.DEFAULT_VALUE
+                    )
+                    @VertHeight
+                        int height) throws WorldEditException {
         size = Math.max(1, size);
+        height = Math.max(1, height);
         we.checkMaxRadius(size);
 
-        int affected = editSession.thaw(session.getPlacementPosition(actor), size);
+        int affected = editSession.thaw(session.getPlacementPosition(actor), size, height);
-        actor.printInfo(TranslatableComponent.of("worldedit.thaw.removed", TextComponent.of(affected)));
+        actor.printInfo(TranslatableComponent.of(
+            "worldedit.thaw.removed", TextComponent.of(affected)
+        ));
         return affected;
     }
 
@@ -508,16 +535,27 @@ public class UtilityCommands {
     @CommandPermissions("worldedit.green")
     @Logging(PLACEMENT)
     public int green(Actor actor, LocalSession session, EditSession editSession,
-                     @Arg(desc = "The radius of the circle to convert in", def = "10")
+                     @Arg(desc = "The radius of the cylinder to convert in", def = "10")
                          double size,
+                     @Arg(
+                         desc = "The height of the cylinder to convert in",
+                         def = HeightConverter.DEFAULT_VALUE
+                     )
+                     @VertHeight
+                         int height,
                      @Switch(name = 'f', desc = "Also convert coarse dirt")
                          boolean convertCoarse) throws WorldEditException {
         size = Math.max(1, size);
+        height = Math.max(1, height);
         we.checkMaxRadius(size);
         final boolean onlyNormalDirt = !convertCoarse;
 
-        final int affected = editSession.green(session.getPlacementPosition(actor), size, onlyNormalDirt);
+        final int affected = editSession.green(
-        actor.printInfo(TranslatableComponent.of("worldedit.green.changed", TextComponent.of(affected)));
+            session.getPlacementPosition(actor), size, height, onlyNormalDirt
+        );
+        actor.printInfo(TranslatableComponent.of(
+            "worldedit.green.changed", TextComponent.of(affected)
+        ));
         return affected;
     }
 

worldedit-core/src/main/java/com/sk89q/worldedit/function/block/SnowSimulator.java

@@ -23,12 +23,15 @@ import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.function.LayerFunction;
 import com.sk89q.worldedit.math.BlockVector3;
+import com.sk89q.worldedit.registry.state.BooleanProperty;
 import com.sk89q.worldedit.registry.state.Property;
 import com.sk89q.worldedit.world.block.BlockState;
 import com.sk89q.worldedit.world.block.BlockTypes;
 
 public class SnowSimulator implements LayerFunction {
 
+    public static final BooleanProperty snowy = (BooleanProperty) (Property<?>) BlockTypes.GRASS_BLOCK.getProperty("snowy");
+
     private final BlockState ice = BlockTypes.ICE.getDefaultState();
     private final BlockState snow = BlockTypes.SNOW.getDefaultState();
     private final BlockState snowBlock = BlockTypes.SNOW_BLOCK.getDefaultState();
@@ -42,6 +45,7 @@ public class SnowSimulator implements LayerFunction {
     private int affected;
 
     public SnowSimulator(Extent extent, boolean stack) {
+
         this.extent = extent;
         this.stack = stack;
 
@@ -66,9 +70,8 @@ public class SnowSimulator implements LayerFunction {
             return true;
         }
 
-        // Can only place on full solid blocks
+        // Stop searching when we hit a movement blocker
-        return block.getBlockType().getMaterial().isFullCube()
+        return block.getBlockType().getMaterial().isMovementBlocker();
-                && block.getBlockType().getMaterial().isSolid();
     }
 
     @Override
@@ -107,16 +110,25 @@ public class SnowSimulator implements LayerFunction {
             // We've hit the highest layer (If it doesn't contain current + 2 it means it's 1 away from full)
             if (!snowLayersProperty.getValues().contains(currentHeight + 2)) {
                 if (this.extent.setBlock(abovePosition, snowBlock)) {
+                    if (block.getStates().containsKey(snowy)) {
+                        this.extent.setBlock(position, block.with(snowy, true));
+                    }
                     this.affected++;
                 }
             } else {
                 if (this.extent.setBlock(abovePosition, above.with(snowLayersProperty, currentHeight + 1))) {
+                    if (block.getStates().containsKey(snowy)) {
+                        this.extent.setBlock(position, block.with(snowy, true));
+                    }
                     this.affected++;
                 }
             }
             return false;
         }
         if (this.extent.setBlock(abovePosition, snow)) {
+            if (block.getStates().containsKey(snowy)) {
+                this.extent.setBlock(position, block.with(snowy, true));
+            }
             this.affected++;
         }
         return false;