Masking changes

Add light related masks
- #opacity
- #brightness
- #blocklight
- #skylight
- #light
- #nolight
- #haslight
Add mask tab completion
Add source masks
- `/gsmask` and `/smask`
- Masking the source instead of the destination (e.g. with //paste)
- if there is no source, the current block/extent will be used

core/src/main/java/com/boydti/fawe/command/MaskBinding.java

@@ -0,0 +1,44 @@
+package com.boydti.fawe.command;
+
+import com.boydti.fawe.util.MainUtil;
+import com.boydti.fawe.util.StringMan;
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.extension.factory.DefaultMaskParser;
+import com.sk89q.worldedit.util.command.parametric.ParameterData;
+import com.sk89q.worldedit.world.registry.BundledBlockData;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class MaskBinding extends FaweBinding {
+    private final WorldEdit worldEdit;
+
+    public MaskBinding(WorldEdit worldEdit) {
+        super(worldEdit);
+        this.worldEdit = worldEdit;
+    }
+
+    @Override
+    public List<String> getSuggestions(ParameterData parameter, String prefix) {
+        int index = prefix.lastIndexOf(",");
+        String start = index != -1 ? prefix.substring(0, index) : "";
+        String current = index != -1 ? prefix.substring(index) : prefix;
+        if (current.isEmpty()) {
+            return MainUtil.prepend(start, Arrays.asList(DefaultMaskParser.ALL_MASKS));
+        }
+        if (current.startsWith("#") || current.startsWith("=")) {
+            return new ArrayList<>();
+        }
+        if (StringMan.isAlphanumeric(current.charAt(0) + "")) {
+            String[] split2 = current.split(":");
+            if (split2.length == 2 || current.endsWith(":")) {
+                start = (start.isEmpty() ? split2[0] : start + " " + split2[0]) + ":";
+                current = split2.length == 2 ? split2[1] : "";
+                return MainUtil.prepend(start, MainUtil.filter(current, BundledBlockData.getInstance().getBlockStates(split2[0])));
+            }
+            List<String> blocks = BundledBlockData.getInstance().getBlockNames(split2[0]);
+            return MainUtil.prepend(start, blocks);
+        }
+        return new ArrayList<>();
+    }
+}

core/src/main/java/com/boydti/fawe/config/BBC.java

@@ -50,6 +50,8 @@ public enum BBC {
 
     MASK_DISABLED("Global mask disabled", "WorldEdit.General"),
     MASK("Global mask set", "WorldEdit.General"),
+    SOURCE_MASK_DISABLED("Global source mask disabled", "WorldEdit.General"),
+    SOURCE_MASK("Global source mask set", "WorldEdit.General"),
     TRANSFORM_DISABLED("Global transform disabled", "WorldEdit.General"),
     TRANSFORM("Global transform set", "WorldEdit.General"),
 
@@ -85,6 +87,7 @@ public enum BBC {
     SELECTION_CLEARED("Selection cleared", "WorldEdit.Selection"),
     SELECTION_NONE("Make a region selection first", "WorldEdit.Selection"),
 
+    BRUSH_NONE("You aren't holding a brush!", "WorldEdit.Brush"),
     BRUSH_BUTCHER("Butcher brush equiped (%s0)", "WorldEdit.Brush"),
     BRUSH_CLIPBOARD("Clipboard brush shape equipped", "WorldEdit.Brush"),
     BRUSH_CYLINDER("Cylinder brush shape equipped (%s0 by %s1).", "WorldEdit.Brush"),
@@ -110,6 +113,8 @@ public enum BBC {
     BRUSH_RANGE("Brush size set", "WorldEdit.Brush"),
     BRUSH_MASK_DISABLED("Brush mask disabled", "WorldEdit.Brush"),
     BRUSH_MASK("Brush mask set", "WorldEdit.Brush"),
+    BRUSH_SOURCE_MASK_DISABLED("Brush source mask disabled", "WorldEdit.Brush"),
+    BRUSH_SOURCE_MASK("Brush source mask set", "WorldEdit.Brush"),
     BRUSH_TRANSFORM_DISABLED("Brush transform disabled", "WorldEdit.Brush"),
     BRUSH_TRANSFORM("Brush transform set", "WorldEdit.Brush"),
     BRUSH_MATERIAL("Brush material set", "WorldEdit.Brush"),

core/src/main/java/com/boydti/fawe/object/brush/DoubleActionBrushTool.java

@@ -30,6 +30,7 @@ public class DoubleActionBrushTool implements DoubleActionTraceTool {
     protected static int MAX_RANGE = 500;
     protected int range = -1;
     private Mask mask = null;
+    private Mask sourceMask = null;
     private ResettableExtent transform = null;
     private DoubleActionBrush brush = null;
     @Nullable
@@ -69,6 +70,15 @@ public class DoubleActionBrushTool implements DoubleActionTraceTool {
         return mask;
     }
 
+    /**
+     * Get the filter.
+     *
+     * @return the filter
+     */
+    public Mask getSourceMask() {
+        return sourceMask;
+    }
+
     /**
      * Set the block filter used for identifying blocks to replace.
      *
@@ -78,6 +88,15 @@ public class DoubleActionBrushTool implements DoubleActionTraceTool {
         this.mask = filter;
     }
 
+    /**
+     * Set the block filter used for identifying blocks to replace.
+     *
+     * @param filter the filter to set
+     */
+    public void setSourceMask(Mask filter) {
+        this.sourceMask = filter;
+    }
+
     /**
      * Set the brush.
      *
@@ -178,6 +197,19 @@ public class DoubleActionBrushTool implements DoubleActionTraceTool {
                 editSession.setMask(newMask);
             }
         }
+        if (sourceMask != null) {
+            Mask existingMask = editSession.getSourceMask();
+
+            if (existingMask == null) {
+                editSession.setSourceMask(sourceMask);
+            } else if (existingMask instanceof MaskIntersection) {
+                ((MaskIntersection) existingMask).add(sourceMask);
+            } else {
+                MaskIntersection newMask = new MaskIntersection(existingMask);
+                newMask.add(sourceMask);
+                editSession.setSourceMask(newMask);
+            }
+        }
         if (transform != null) {
             editSession.addTransform(transform);
         }

core/src/main/java/com/boydti/fawe/object/extent/FastWorldEditExtent.java

@@ -40,6 +40,31 @@ public class FastWorldEditExtent extends AbstractDelegateExtent implements HasFa
         return queue;
     }
 
+    @Override
+    public int getLight(int x, int y, int z) {
+        return queue.getLight(x, y, z);
+    }
+
+    @Override
+    public int getBlockLight(int x, int y, int z) {
+        return queue.getEmmittedLight(x, y, z);
+    }
+
+    @Override
+    public int getSkyLight(int x, int y, int z) {
+        return queue.getSkyLight(x, y, z);
+    }
+
+    @Override
+    public int getBrightness(int x, int y, int z) {
+        return queue.getBrightness(x, y, z);
+    }
+
+    @Override
+    public int getOpacity(int x, int y, int z) {
+        return queue.getOpacity(x, y, z);
+    }
+
     @Override
     public Entity createEntity(final Location loc, final BaseEntity entity) {
         if (entity != null) {

core/src/main/java/com/boydti/fawe/object/extent/LightingExtent.java

@@ -0,0 +1,11 @@
+package com.boydti.fawe.object.extent;
+
+import com.sk89q.worldedit.extent.Extent;
+
+public interface LightingExtent extends Extent {
+    int getLight(int x, int y, int z);
+    int getSkyLight(int x, int y, int z);
+    int getBlockLight(int x, int y, int z);
+    int getOpacity(int x, int y, int z);
+    int getBrightness(int x, int y, int z);
+}

core/src/main/java/com/boydti/fawe/object/extent/SourceMaskExtent.java

@@ -0,0 +1,55 @@
+package com.boydti.fawe.object.extent;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.WorldEditException;
+import com.sk89q.worldedit.blocks.BaseBlock;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.mask.Mask;
+
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+public class SourceMaskExtent extends TemporalExtent {
+    private Mask mask;
+    private Vector mutable = new Vector();
+
+
+    /**
+     * Get the mask.
+     *
+     * @return the mask
+     */
+    public Mask getMask() {
+        return mask;
+    }
+
+    /**
+     * Set a mask.
+     *
+     * @param mask a mask
+     */
+    public void setMask(Mask mask) {
+        checkNotNull(mask);
+        this.mask = mask;
+    }
+
+    public SourceMaskExtent(Extent extent, Mask mask) {
+        super(extent);
+        checkNotNull(mask);
+        this.mask = mask;
+    }
+    @Override
+    public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
+        set((int) location.x, (int) location.y, (int) location.z, block);
+        return mask.test(location) && super.setBlock(location, block);
+    }
+
+    @Override
+    public boolean setBlock(int x, int y, int z, BaseBlock block) throws WorldEditException {
+        set(x, y, z, block);
+        mutable.x = x;
+        mutable.y = y;
+        mutable.z = z;
+        return mask.test(mutable) && super.setBlock(x, y, z, block);
+    }
+}

core/src/main/java/com/boydti/fawe/object/extent/TemporalExtent.java

@@ -0,0 +1,86 @@
+package com.boydti.fawe.object.extent;
+
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.blocks.BaseBlock;
+import com.sk89q.worldedit.blocks.BlockMaterial;
+import com.sk89q.worldedit.extent.AbstractDelegateExtent;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.registry.BundledBlockData;
+
+public class TemporalExtent extends AbstractDelegateExtent {
+    private int x,y,z = Integer.MAX_VALUE;
+    private BaseBlock block = EditSession.nullBlock;
+
+    private int bx,bz = Integer.MAX_VALUE;
+    private BaseBiome biome = EditSession.nullBiome;
+
+    /**
+     * Create a new instance.
+     *
+     * @param extent the extent
+     */
+    public TemporalExtent(Extent extent) {
+        super(extent);
+    }
+
+
+    public void set(int x, int y, int z, BaseBlock block) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+        this.block = block;
+    }
+
+    public void set(int x, int z, BaseBiome biome) {
+        this.bx = x;
+        this.bz = z;
+        this.biome = biome;
+    }
+
+    @Override
+    public int getBrightness(int x, int y, int z) {
+        if (this.x == x && this.y == y && this.z == z) {
+            BlockMaterial block = BundledBlockData.getInstance().getMaterialById(this.block.getId());
+            if (block == null) {
+                return 15;
+            }
+            return Math.min(15, block.getLightValue());
+        }
+        return super.getBrightness(x, y, z);
+    }
+
+    @Override
+    public BaseBlock getBlock(Vector position) {
+        if (position.x == x && position.y == y && position.z == z) {
+            return block;
+        }
+        return super.getBlock(position);
+    }
+
+    @Override
+    public BaseBlock getLazyBlock(Vector position) {
+        if (position.x == x && position.y == y && position.z == z) {
+            return block;
+        }
+        return super.getLazyBlock(position);
+    }
+
+    @Override
+    public BaseBlock getLazyBlock(int x, int y, int z) {
+        if (this.x == x && this.y == y && this.z == z) {
+            return block;
+        }
+        return super.getLazyBlock(x, y, z);
+    }
+
+    @Override
+    public BaseBiome getBiome(Vector2D position) {
+        if (position.getX() == bx && position.getZ() == bz) {
+            return biome;
+        }
+        return super.getBiome(position);
+    }
+}

core/src/main/java/com/boydti/fawe/object/mask/BlockLightMask.java

@@ -0,0 +1,35 @@
+package com.boydti.fawe.object.mask;
+
+import com.boydti.fawe.object.extent.LightingExtent;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.function.mask.Mask2D;
+import javax.annotation.Nullable;
+
+public class BlockLightMask implements Mask {
+
+    private final Extent extent;
+    private final int min,max;
+
+    public BlockLightMask(Extent extent, int min, int max) {
+        this.extent = extent;
+        this.min = min;
+        this.max = max;
+    }
+
+    @Override
+    public boolean test(Vector vector) {
+        if (extent instanceof LightingExtent) {
+            int light = ((LightingExtent) extent).getBlockLight((int) vector.x, (int) vector.y, (int) vector.z);
+            return light >= min && light <= max;
+        }
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+}

core/src/main/java/com/boydti/fawe/object/mask/BrightnessMask.java

@@ -0,0 +1,35 @@
+package com.boydti.fawe.object.mask;
+
+import com.boydti.fawe.object.extent.LightingExtent;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.function.mask.Mask2D;
+import javax.annotation.Nullable;
+
+public class BrightnessMask implements Mask {
+
+    private final Extent extent;
+    private final int min,max;
+
+    public BrightnessMask(Extent extent, int min, int max) {
+        this.extent = extent;
+        this.min = min;
+        this.max = max;
+    }
+
+    @Override
+    public boolean test(Vector vector) {
+        if (extent instanceof LightingExtent) {
+            int light = ((LightingExtent) extent).getBrightness((int) vector.x, (int) vector.y, (int) vector.z);
+            return light >= min && light <= max;
+        }
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+}

core/src/main/java/com/boydti/fawe/object/mask/LightMask.java

@@ -0,0 +1,35 @@
+package com.boydti.fawe.object.mask;
+
+import com.boydti.fawe.object.extent.LightingExtent;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.function.mask.Mask2D;
+import javax.annotation.Nullable;
+
+public class LightMask implements Mask {
+
+    private final Extent extent;
+    private final int min,max;
+
+    public LightMask(Extent extent, int min, int max) {
+        this.extent = extent;
+        this.min = min;
+        this.max = max;
+    }
+
+    @Override
+    public boolean test(Vector vector) {
+        if (extent instanceof LightingExtent) {
+            int light = ((LightingExtent) extent).getLight((int) vector.x, (int) vector.y, (int) vector.z);
+            return light >= min && light <= max;
+        }
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+}

core/src/main/java/com/boydti/fawe/object/mask/OpacityMask.java

@@ -0,0 +1,35 @@
+package com.boydti.fawe.object.mask;
+
+import com.boydti.fawe.object.extent.LightingExtent;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.function.mask.Mask2D;
+import javax.annotation.Nullable;
+
+public class OpacityMask implements Mask {
+
+    private final Extent extent;
+    private final int min,max;
+
+    public OpacityMask(Extent extent, int min, int max) {
+        this.extent = extent;
+        this.min = min;
+        this.max = max;
+    }
+
+    @Override
+    public boolean test(Vector vector) {
+        if (extent instanceof LightingExtent) {
+            int light = ((LightingExtent) extent).getOpacity((int) vector.x, (int) vector.y, (int) vector.z);
+            return light >= min && light <= max;
+        }
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+}

core/src/main/java/com/boydti/fawe/object/mask/SkyLightMask.java

@@ -0,0 +1,35 @@
+package com.boydti.fawe.object.mask;
+
+import com.boydti.fawe.object.extent.LightingExtent;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.mask.Mask;
+import com.sk89q.worldedit.function.mask.Mask2D;
+import javax.annotation.Nullable;
+
+public class SkyLightMask implements Mask {
+
+    private final Extent extent;
+    private final int min,max;
+
+    public SkyLightMask(Extent extent, int min, int max) {
+        this.extent = extent;
+        this.min = min;
+        this.max = max;
+    }
+
+    @Override
+    public boolean test(Vector vector) {
+        if (extent instanceof LightingExtent) {
+            int light = ((LightingExtent) extent).getSkyLight((int) vector.x, (int) vector.y, (int) vector.z);
+            return light >= min && light <= max;
+        }
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public Mask2D toMask2D() {
+        return null;
+    }
+}

core/src/main/java/com/boydti/fawe/object/schematic/Schematic.java

@@ -2,6 +2,7 @@ package com.boydti.fawe.object.schematic;
 
 import com.boydti.fawe.object.clipboard.ReadOnlyClipboard;
 import com.boydti.fawe.util.EditSessionBuilder;
+import com.boydti.fawe.util.MaskTraverser;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.Vector;
@@ -12,6 +13,7 @@ import com.sk89q.worldedit.extent.clipboard.io.ClipboardFormat;
 import com.sk89q.worldedit.extent.clipboard.io.ClipboardWriter;
 import com.sk89q.worldedit.extent.transform.BlockTransformExtent;
 import com.sk89q.worldedit.function.mask.ExistingBlockMask;
+import com.sk89q.worldedit.function.mask.Mask;
 import com.sk89q.worldedit.function.operation.ForwardExtentCopy;
 import com.sk89q.worldedit.function.operation.Operations;
 import com.sk89q.worldedit.math.transform.Transform;
@@ -114,6 +116,12 @@ public class Schematic {
         if (transform != null) {
             copy.setTransform(transform);
         }
+        Mask sourceMask = editSession.getSourceMask();
+        if (sourceMask != null) {
+            new MaskTraverser(sourceMask).reset(extent);
+            copy.setSourceMask(sourceMask);
+            editSession.setSourceMask(null);
+        }
         if (!pasteAir) {
             copy.setSourceMask(new ExistingBlockMask(clipboard));
         }

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

@@ -44,10 +44,12 @@ import com.boydti.fawe.object.changeset.MemoryOptimizedHistory;
 import com.boydti.fawe.object.exception.FaweException;
 import com.boydti.fawe.object.extent.FastWorldEditExtent;
 import com.boydti.fawe.object.extent.FaweRegionExtent;
+import com.boydti.fawe.object.extent.LightingExtent;
 import com.boydti.fawe.object.extent.NullExtent;
 import com.boydti.fawe.object.extent.ProcessedWEExtent;
 import com.boydti.fawe.object.extent.ResettableExtent;
 import com.boydti.fawe.object.extent.SlowExtent;
+import com.boydti.fawe.object.extent.SourceMaskExtent;
 import com.boydti.fawe.object.mask.ResettableMask;
 import com.boydti.fawe.object.progress.DefaultProgressTracker;
 import com.boydti.fawe.util.ExtentTraverser;
@@ -155,7 +157,7 @@ import static com.sk89q.worldedit.regions.Regions.minimumBlockY;
  * {@link Extent}s that are chained together. For example, history is logged
  * using the {@link ChangeSetExtent}.</p>
  */
-public class EditSession extends AbstractWorld implements HasFaweQueue {
+public class EditSession extends AbstractWorld implements HasFaweQueue, LightingExtent {
     /**
      * Used by {@link #setBlock(Vector, BaseBlock, Stage)} to
      * determine which {@link Extent}s should be bypassed.
@@ -592,6 +594,16 @@ public class EditSession extends AbstractWorld implements HasFaweQueue {
         return maskingExtent != null ? maskingExtent.get().getMask() : null;
     }
 
+    /**
+     * Get the mask.
+     *
+     * @return mask, may be null
+     */
+    public Mask getSourceMask() {
+        ExtentTraverser<SourceMaskExtent> maskingExtent = new ExtentTraverser(this.extent).find(SourceMaskExtent.class);
+        return maskingExtent != null ? maskingExtent.get().getMask() : null;
+    }
+
     public void addTransform(ResettableExtent transform) {
         if (transform == null) {
             ExtentTraverser<AbstractDelegateExtent> traverser = new ExtentTraverser(this.extent).find(ResettableExtent.class);
@@ -607,6 +619,29 @@ public class EditSession extends AbstractWorld implements HasFaweQueue {
         }
     }
 
+    /**
+     * Set a mask.
+     *
+     * @param mask mask or null
+     */
+    public void setSourceMask(Mask mask) {
+        if (mask == null) {
+            mask = Masks.alwaysTrue();
+        } else {
+            new MaskTraverser(mask).reset(this);
+        }
+        ExtentTraverser<SourceMaskExtent> maskingExtent = new ExtentTraverser(this.extent).find(SourceMaskExtent.class);
+        if (maskingExtent != null && maskingExtent.get() != null) {
+            Mask oldMask = maskingExtent.get().getMask();
+            if (oldMask instanceof ResettableMask) {
+                ((ResettableMask) oldMask).reset();
+            }
+            maskingExtent.get().setMask(mask);
+        } else if (mask != Masks.alwaysTrue()) {
+            this.extent = new SourceMaskExtent(this.extent, mask);
+        }
+    }
+
     /**
      * Set a mask.
      *
@@ -792,6 +827,31 @@ public class EditSession extends AbstractWorld implements HasFaweQueue {
         return this.extent.setBiome(position, biome);
     }
 
+    @Override
+    public int getLight(int x, int y, int z) {
+        return queue.getLight(x, y, z);
+    }
+
+    @Override
+    public int getBlockLight(int x, int y, int z) {
+        return queue.getEmmittedLight(x, y, z);
+    }
+
+    @Override
+    public int getSkyLight(int x, int y, int z) {
+        return queue.getSkyLight(x, y, z);
+    }
+
+    @Override
+    public int getBrightness(int x, int y, int z) {
+        return queue.getBrightness(x, y, z);
+    }
+
+    @Override
+    public int getOpacity(int x, int y, int z) {
+        return queue.getOpacity(x, y, z);
+    }
+
     @Override
     public BaseBlock getLazyBlock(final Vector position) {
         if (position.y > maxY || position.y < 0) {
@@ -1794,6 +1854,12 @@ public class EditSession extends AbstractWorld implements HasFaweQueue {
         final ForwardExtentCopy copy = new ForwardExtentCopy(EditSession.this, region, EditSession.this, to);
         copy.setRepetitions(count);
         copy.setTransform(new AffineTransform().translate(dir.multiply(size)));
+        Mask sourceMask = getSourceMask();
+        if (sourceMask != null) {
+            new MaskTraverser(sourceMask).reset(EditSession.this);
+            copy.setSourceMask(sourceMask);
+            setSourceMask(null);
+        }
         if (!copyAir) {
             copy.setSourceMask(new ExistingBlockMask(EditSession.this));
         }
@@ -1844,6 +1910,12 @@ public class EditSession extends AbstractWorld implements HasFaweQueue {
         copy.setTransform(new AffineTransform().translate(dir.multiply(distance)));
         copy.setSourceFunction(remove); // Remove
         copy.setRemovingEntities(true);
+        Mask sourceMask = getSourceMask();
+        if (sourceMask != null) {
+            new MaskTraverser(sourceMask).reset(EditSession.this);
+            copy.setSourceMask(sourceMask);
+            setSourceMask(null);
+        }
         if (!copyAir) {
             copy.setSourceMask(new ExistingBlockMask(EditSession.this));
         }

core/src/main/java/com/sk89q/worldedit/LocalSession.java

@@ -139,6 +139,7 @@ public class LocalSession {
     private transient int cuiVersion = -1;
     private transient boolean fastMode = false;
     private transient Mask mask;
+    private transient Mask sourceMask;
     private ResettableExtent transform = null;
     private transient TimeZone timezone = TimeZone.getDefault();
 
@@ -1238,6 +1239,9 @@ public class LocalSession {
         if (mask != null) {
             editSession.setMask(mask);
         }
+        if (sourceMask != null) {
+            editSession.setSourceMask(sourceMask);
+        }
         if (transform != null) {
             editSession.addTransform(transform);
         }
@@ -1272,6 +1276,15 @@ public class LocalSession {
         return mask;
     }
 
+    /**
+     * Get the mask.
+     *
+     * @return mask, may be null
+     */
+    public Mask getSourceMask() {
+        return sourceMask;
+    }
+
     /**
      * Set a mask.
      *
@@ -1281,6 +1294,15 @@ public class LocalSession {
         this.mask = mask;
     }
 
+    /**
+     * Set a mask.
+     *
+     * @param mask mask or null
+     */
+    public void setSourceMask(Mask mask) {
+        this.sourceMask = mask;
+    }
+
     /**
      * Set a mask.
      *
@@ -1291,6 +1313,16 @@ public class LocalSession {
         setMask(mask != null ? Masks.wrap(mask) : null);
     }
 
+    /**
+     * Set a mask.
+     *
+     * @param mask mask or null
+     */
+    @SuppressWarnings("deprecation")
+    public void setSourceMask(com.sk89q.worldedit.masks.Mask mask) {
+        setSourceMask(mask != null ? Masks.wrap(mask) : null);
+    }
+
     public ResettableExtent getTransform() {
         return transform;
     }

core/src/main/java/com/sk89q/worldedit/command/ClipboardCommands.java

@@ -25,6 +25,7 @@ import com.boydti.fawe.object.RunnableVal2;
 import com.boydti.fawe.object.clipboard.ReadOnlyClipboard;
 import com.boydti.fawe.object.io.FastByteArrayOutputStream;
 import com.boydti.fawe.util.ImgurUtility;
+import com.boydti.fawe.util.MaskTraverser;
 import com.sk89q.minecraft.util.commands.Command;
 import com.sk89q.minecraft.util.commands.CommandException;
 import com.sk89q.minecraft.util.commands.CommandPermissions;
@@ -141,6 +142,12 @@ public class ClipboardCommands {
 
         clipboard.setOrigin(session.getPlacementPosition(player));
         ForwardExtentCopy copy = new ForwardExtentCopy(editSession, region, clipboard, region.getMinimumPoint());
+        Mask sourceMask = editSession.getSourceMask();
+        if (sourceMask != null) {
+            new MaskTraverser(sourceMask).reset(editSession);
+            copy.setSourceMask(sourceMask);
+            editSession.setSourceMask(null);
+        }
         if (mask != null && mask != Masks.alwaysTrue()) {
             copy.setSourceMask(mask);
         }
@@ -173,6 +180,12 @@ public class ClipboardCommands {
         clipboard.setOrigin(session.getPlacementPosition(player));
         ForwardExtentCopy copy = new ForwardExtentCopy(editSession, region, clipboard, region.getMinimumPoint());
         copy.setSourceFunction(new BlockReplace(editSession, leavePattern));
+        Mask sourceMask = editSession.getSourceMask();
+        if (sourceMask != null) {
+            new MaskTraverser(sourceMask).reset(editSession);
+            copy.setSourceMask(sourceMask);
+            editSession.setSourceMask(null);
+        }
         if (mask != null) {
             copy.setSourceMask(mask);
         }
@@ -253,7 +266,7 @@ public class ClipboardCommands {
                       @Switch('a') boolean ignoreAirBlocks, @Switch('o') boolean atOrigin,
                       @Switch('s') boolean selectPasted) throws WorldEditException {
         ClipboardHolder holder = session.getClipboard();
-        if (holder.getTransform().isIdentity()) {
+        if (holder.getTransform().isIdentity() && editSession.getSourceMask() == null) {
             place(player, session, editSession, ignoreAirBlocks, atOrigin, selectPasted);
             return;
         }

core/src/main/java/com/sk89q/worldedit/command/GeneralCommands.java

@@ -101,7 +101,7 @@ public class GeneralCommands {
     }
 
     @Command(
-            aliases = { "/gmask", "gmask" },
+            aliases = { "/gmask", "gmask", "globalmask", "/globalmask" },
             usage = "[mask]",
             desc = "Set the global mask",
             min = 0,
@@ -124,6 +124,30 @@ public class GeneralCommands {
         }
     }
 
+    @Command(
+            aliases = { "/gsmask", "gsmask", "globalsourcemask", "/globalsourcemask" },
+            usage = "[mask]",
+            desc = "Set the global source mask",
+            min = 0,
+            max = -1
+    )
+    @CommandPermissions("worldedit.global-mask")
+    public void gsmask(Player player, LocalSession session, EditSession editSession, @Optional CommandContext context) throws WorldEditException {
+        if (context == null || context.argsLength() == 0) {
+            session.setSourceMask((Mask) null);
+            BBC.SOURCE_MASK_DISABLED.send(player);
+        } else {
+            ParserContext parserContext = new ParserContext();
+            parserContext.setActor(player);
+            parserContext.setWorld(player.getWorld());
+            parserContext.setSession(session);
+            parserContext.setExtent(editSession);
+            Mask mask = worldEdit.getMaskFactory().parseFromInput(context.getJoinedStrings(0), parserContext);
+            session.setSourceMask(mask);
+            BBC.SOURCE_MASK.send(player);
+        }
+    }
+
     @Command(
             aliases = { "/gtransform", "gtransform" },
             usage = "[transform]",

core/src/main/java/com/sk89q/worldedit/command/RegionCommands.java

@@ -577,11 +577,15 @@ public class RegionCommands {
     @Logging(REGION)
     public void regenerateChunk(Player player, LocalSession session, EditSession editSession, @Selection Region region) throws WorldEditException {
         Mask mask = session.getMask();
+        Mask sourceMask = session.getSourceMask();
         try {
             session.setMask((Mask) null);
+            session.setSourceMask((Mask) null);
             player.getWorld().regenerate(region, editSession);
         } finally {
             session.setMask(mask);
+            session.setSourceMask(mask);
+
         }
         BBC.COMMAND_REGEN.send(player);
     }

core/src/main/java/com/sk89q/worldedit/command/ToolUtilCommands.java

@@ -61,7 +61,7 @@ public class ToolUtilCommands {
     }
 
     @Command(
-            aliases = { "mask" },
+            aliases = { "mask", "/mask" },
             usage = "[mask]",
             desc = "Set the brush mask",
             min = 0,
@@ -71,6 +71,7 @@ public class ToolUtilCommands {
     public void mask(Player player, LocalSession session, EditSession editSession, @Optional CommandContext context) throws WorldEditException {
         Tool tool = session.getTool(player.getItemInHand());
         if (tool == null) {
+            player.print(BBC.BRUSH_NONE.f());
             return;
         }
         if (context == null || context.argsLength() == 0) {
@@ -96,6 +97,43 @@ public class ToolUtilCommands {
         }
     }
 
+    @Command(
+            aliases = { "smask", "/smask", "/sourcemask", "sourcemask" },
+            usage = "[mask]",
+            desc = "Set the brush mask",
+            min = 0,
+            max = -1
+    )
+    @CommandPermissions("worldedit.brush.options.mask")
+    public void smask(Player player, LocalSession session, EditSession editSession, @Optional CommandContext context) throws WorldEditException {
+        Tool tool = session.getTool(player.getItemInHand());
+        if (tool == null) {
+            player.print(BBC.BRUSH_NONE.f());
+            return;
+        }
+        if (context == null || context.argsLength() == 0) {
+            if (tool instanceof BrushTool) {
+                ((BrushTool) tool).setSourceMask(null);
+            } else if (tool instanceof DoubleActionBrushTool) {
+                ((DoubleActionBrushTool) tool).setMask(null);
+            }
+            BBC.BRUSH_SOURCE_MASK_DISABLED.send(player);
+        } else {
+            ParserContext parserContext = new ParserContext();
+            parserContext.setActor(player);
+            parserContext.setWorld(player.getWorld());
+            parserContext.setSession(session);
+            parserContext.setExtent(editSession);
+            Mask mask = we.getMaskFactory().parseFromInput(context.getJoinedStrings(0), parserContext);
+            if (tool instanceof BrushTool) {
+                ((BrushTool) tool).setSourceMask(mask);
+            } else if (tool instanceof DoubleActionBrushTool) {
+                ((DoubleActionBrushTool) tool).setSourceMask(mask);
+            }
+            BBC.BRUSH_SOURCE_MASK.send(player);
+        }
+    }
+
     @Command(
             aliases = { "transform" },
             usage = "[transform]",

core/src/main/java/com/sk89q/worldedit/command/tool/BrushTool.java

@@ -29,6 +29,7 @@ public class BrushTool implements TraceTool {
     protected static int MAX_RANGE = 500;
     protected int range = -1;
     private Mask mask = null;
+    private Mask sourceMask = null;
     private ResettableExtent transform = null;
     private Brush brush = new SphereBrush();
     @Nullable
@@ -77,6 +78,24 @@ public class BrushTool implements TraceTool {
         this.mask = filter;
     }
 
+    /**
+     * Get the filter.
+     *
+     * @return the filter
+     */
+    public Mask getSourceMask() {
+        return sourceMask;
+    }
+
+    /**
+     * Set the block filter used for identifying blocks to replace.
+     *
+     * @param filter the filter to set
+     */
+    public void setSourceMask(Mask filter) {
+        this.sourceMask = filter;
+    }
+
     /**
      * Set the brush.
      *
@@ -178,6 +197,19 @@ public class BrushTool implements TraceTool {
                 editSession.setMask(newMask);
             }
         }
+        if (sourceMask != null) {
+            Mask existingMask = editSession.getMask();
+
+            if (existingMask == null) {
+                editSession.setSourceMask(sourceMask);
+            } else if (existingMask instanceof MaskIntersection) {
+                ((MaskIntersection) existingMask).add(sourceMask);
+            } else {
+                MaskIntersection newMask = new MaskIntersection(existingMask);
+                newMask.add(sourceMask);
+                editSession.setSourceMask(newMask);
+            }
+        }
         if (transform != null) {
             editSession.addTransform(transform);
         }

core/src/main/java/com/sk89q/worldedit/extension/factory/DefaultMaskParser.java

@@ -1,24 +1,16 @@
 package com.sk89q.worldedit.extension.factory;
 
 import com.boydti.fawe.command.FaweParser;
-import com.boydti.fawe.object.mask.AdjacentMask;
+import com.boydti.fawe.command.SuggestInputParseException;
-import com.boydti.fawe.object.mask.AngleMask;
+import com.boydti.fawe.object.mask.*;
-import com.boydti.fawe.object.mask.CustomMask;
+import com.boydti.fawe.util.MainUtil;
-import com.boydti.fawe.object.mask.DataMask;
+import com.boydti.fawe.util.StringMan;
-import com.boydti.fawe.object.mask.IdDataMask;
-import com.boydti.fawe.object.mask.IdMask;
-import com.boydti.fawe.object.mask.RadiusMask;
-import com.boydti.fawe.object.mask.WallMask;
-import com.boydti.fawe.object.mask.XAxisMask;
-import com.boydti.fawe.object.mask.YAxisMask;
-import com.boydti.fawe.object.mask.ZAxisMask;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.IncompleteRegionException;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.WorldEdit;
 import com.sk89q.worldedit.blocks.BaseBlock;
 import com.sk89q.worldedit.extension.input.InputParseException;
-import com.sk89q.worldedit.extension.input.NoMatchException;
 import com.sk89q.worldedit.extension.input.ParserContext;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.function.mask.BiomeMask2D;
@@ -27,6 +19,7 @@ import com.sk89q.worldedit.function.mask.ExistingBlockMask;
 import com.sk89q.worldedit.function.mask.ExpressionMask;
 import com.sk89q.worldedit.function.mask.Mask;
 import com.sk89q.worldedit.function.mask.MaskIntersection;
+import com.sk89q.worldedit.function.mask.MaskUnion;
 import com.sk89q.worldedit.function.mask.Masks;
 import com.sk89q.worldedit.function.mask.NoiseFilter;
 import com.sk89q.worldedit.function.mask.OffsetMask;
@@ -58,16 +51,24 @@ public class DefaultMaskParser extends FaweParser<Mask> {
 
     public static final String[] EXPRESSION_MASK = new String[] { "=<expression>" };
 
-    public static final String[] BLOCK_MASK = new String[] { "<block>" };
+    public static final String[] BLOCK_MASK = new String[] { "<blocks>" };
 
     public static final String[] SIMPLE_MASK = new String[] {
-            "#existing", "#solid", "#dregion", "#dselection", "#dsel", "#selection", "#region", "#sel", "#xaxis", "#yaxis", "#zaxis", "#id", "#data", "#wall", "#surface",
+            "#nolight", "#haslight", "#existing", "#solid", "#dregion", "#dselection", "#dsel", "#selection", "#region", "#sel", "#xaxis", "#yaxis", "#zaxis", "#id", "#data", "#wall", "#surface",
     };
 
-    public static final String[] MISC_PATTERNS = new String[] {
+    public static final String[] DELEGATE_MASKS = new String[] {
-            "hand", "pos1",
+        "#offset:", "#light:", "#blocklight:", "#skylight:", "#brightness:", "#opacity:"
     };
 
+    public static final String[] CHARACTER_MASKS= new String[] {
+            "/", "{", "|", "~", ">", "<", "$", "%", "=", "!",
+    };
+
+    public static final String[] HASHTAG_MASKS = MainUtil.joinArrayGeneric(SIMPLE_MASK, DELEGATE_MASKS);
+
+    public static final String[] ALL_MASKS = MainUtil.joinArrayGeneric(EXPRESSION_MASK, BLOCK_MASK, SIMPLE_MASK, DELEGATE_MASKS, CHARACTER_MASKS);
+
     public DefaultMaskParser(WorldEdit worldEdit) {
         super(worldEdit);
     }
@@ -111,19 +112,83 @@ public class DefaultMaskParser extends FaweParser<Mask> {
         }
     }
 
-    private Mask getBlockMaskComponent(List<Mask> masks, String component, ParserContext context) throws InputParseException {
+    public Mask catchSuggestion(String currentInput, List<Mask> masks, String nextInput, ParserContext context) throws InputParseException {
+        try {
+            return getBlockMaskComponent(masks, nextInput, context);
+        } catch (SuggestInputParseException e) {
+            e.prepend(currentInput.substring(0, currentInput.length() - nextInput.length()));
+            throw e;
+        }
+    }
+
+    private Mask getBlockMaskComponent(List<Mask> masks, String input, ParserContext context) throws InputParseException {
         Extent extent = Request.request().getExtent();
 
-        final char firstChar = component.charAt(0);
+        final char firstChar = input.charAt(0);
         switch (firstChar) {
             case '#':
-                int colon = component.indexOf(':');
+                int colon = input.indexOf(':');
+                String component = input;
                 if (colon != -1) {
-                    String rest = component.substring(colon + 1);
                     component = component.substring(0, colon);
-                    masks.add(getBlockMaskComponent(masks, rest, context));
+                    String rest = input.substring(colon + 1);
+                    switch (component.toLowerCase()) {
+                        case "#light":
+                        case "#skylight":
+                        case "#blocklight":
+                        case "#emittedlight":
+                        case "#opacity":
+                        case "#brightness":
+                            String[] split = rest.split(":");
+                            if (split.length < 2) {
+                                throw new SuggestInputParseException(input, component + ":<min>:<max>");
+                            } else if (split.length > 2) {
+                                masks.add(catchSuggestion(input, masks, StringMan.join(Arrays.copyOfRange(split, 2, split.length), ":"), context));
+                            }
+                            try {
+                                int y1 = (int) Math.abs(Expression.compile(split[0]).evaluate());
+                                int y2 = (int) Math.abs(Expression.compile(split[1]).evaluate());
+                                switch (component.toLowerCase()) {
+                                    case "#light":
+                                        return new LightMask(extent, y1, y2);
+                                    case "#skylight":
+                                        return new SkyLightMask(extent, y1, y2);
+                                    case "#blocklight":
+                                    case "#emittedlight":
+                                        return new BlockLightMask(extent, y1, y2);
+                                    case "#opacity":
+                                        return new OpacityMask(extent, y1, y2);
+                                    case "#brightness":
+                                        return new BrightnessMask(extent, y1, y2);
+                                }
+                            } catch (NumberFormatException | ExpressionException e) {
+                                e.printStackTrace();
+                                throw new SuggestInputParseException(input, component + ":<min>:<max>");
+                            }
+                        case "#~":
+                        case "#rel":
+                        case "#relative":
+                        case "#offset":
+                            try {
+                                List<String> split3 = suggestRemaining(rest, "#offset", "<dx>", "<dy>", "<dz>", "<mask>");
+                                int x = (int) Expression.compile(split3.get(0)).evaluate();
+                                int y = (int) Expression.compile(split3.get(1)).evaluate();
+                                int z = (int) Expression.compile(split3.get(2)).evaluate();
+                                rest = StringMan.join(split3.subList(3, split3.size()), ":");
+                                Mask mask = catchSuggestion(input, masks, rest, context);
+                                return new OffsetMask(mask, new Vector(x, y, z));
+                            } catch (NumberFormatException | ExpressionException | IndexOutOfBoundsException e) {
+                                throw new SuggestInputParseException(null, "#offset:<dx>:<dy>:<dz>:<mask>");
+                            }
+                    }
+                    Mask mask = catchSuggestion(input, masks, rest, context);
+                    masks.add(mask);
                 }
                 switch (component.toLowerCase()) {
+                    case "#haslight":
+                        return new LightMask(extent, 1, Integer.MAX_VALUE);
+                    case "#nolight":
+                        return new LightMask(extent, 0, 0);
                     case "#existing":
                         return new ExistingBlockMask(extent);
                     case "#solid":
@@ -160,38 +225,38 @@ public class DefaultMaskParser extends FaweParser<Mask> {
                         masks.add(new ExistingBlockMask(extent));
                         return new AdjacentMask(extent, Arrays.asList(new BaseBlock(0)), 1, 8);
                     default:
-                        throw new NoMatchException("Unrecognized mask '" + component + "'");
+                        throw new SuggestInputParseException(input, HASHTAG_MASKS);
                 }
             case '\\':
             case '/': {
-                String[] split = component.substring(1).split(",");
+                String[] split = input.substring(1).split(":");
                 if (split.length != 2) {
-                    throw new InputParseException("Unknown angle '" + component + "' (not in form `/#,#`)");
+                    throw new SuggestInputParseException(input, "/<min-angle>:<max-angle>");
                 }
                 try {
                     int y1 = (int) Math.abs(Expression.compile(split[0]).evaluate());
                     int y2 = (int) Math.abs(Expression.compile(split[1]).evaluate());
                     return new AngleMask(extent, y1, y2);
                 } catch (NumberFormatException | ExpressionException e) {
-                    throw new InputParseException("Unknown angle '" + component + "' (not in form `/#,#`)");
+                    throw new SuggestInputParseException(input, "/<min-angle>:<max-angle>");
                 }
             }
             case '{': {
-                String[] split = component.substring(1).split(",");
+                String[] split = input.substring(1).split(":");
                 if (split.length != 2) {
-                    throw new InputParseException("Unknown range '" + component + "' (not in form `{#,#`)");
+                    throw new SuggestInputParseException(input, "{<min-radius>:<max-radius>");
                 }
                 try {
                     int y1 = (int) Math.abs(Expression.compile(split[0]).evaluate());
                     int y2 = (int) Math.abs(Expression.compile(split[1]).evaluate());
                     return new RadiusMask(y1, y2);
                 } catch (NumberFormatException | ExpressionException e) {
-                    throw new InputParseException("Unknown range '" + component + "' (not in form `{#,#`)");
+                    throw new SuggestInputParseException(input, "{<min-radius>:<max-radius>");
                 }
             }
             case '|':
             case '~': {
-                String[] split = component.substring(1).split("=");
+                String[] split = input.substring(1).split("=");
                 ParserContext tempContext = new ParserContext(context);
                 tempContext.setRestricted(false);
                 tempContext.setPreferringWildcard(true);
@@ -206,19 +271,19 @@ public class DefaultMaskParser extends FaweParser<Mask> {
                         }
                     }
                     if (firstChar == '~') {
-                        return new AdjacentMask(extent, worldEdit.getBlockFactory().parseFromListInput(component.substring(1), tempContext), requiredMin, requiredMax);
+                        return new AdjacentMask(extent, worldEdit.getBlockFactory().parseFromListInput(input.substring(1), tempContext), requiredMin, requiredMax);
                     } else {
-                        return new WallMask(extent, worldEdit.getBlockFactory().parseFromListInput(component.substring(1), tempContext), requiredMin, requiredMax);
+                        return new WallMask(extent, worldEdit.getBlockFactory().parseFromListInput(input.substring(1), tempContext), requiredMin, requiredMax);
                     }
                 } catch (NumberFormatException | ExpressionException e) {
-                    throw new InputParseException("Unknown adjacent mask '" + component + "' (not in form `~<ids>[=count]`)");
+                    throw new SuggestInputParseException(input, "~<blocks>=<amount>");
                 }
             }
             case '>':
             case '<':
                 Mask submask;
-                if (component.length() > 1) {
+                if (input.length() > 1) {
-                    submask = getBlockMaskComponent(masks, component.substring(1), context);
+                    submask = getBlockMaskComponent(masks, input.substring(1), context);
                 } else {
                     submask = new ExistingBlockMask(extent);
                 }
@@ -227,58 +292,80 @@ public class DefaultMaskParser extends FaweParser<Mask> {
 
             case '$':
                 Set<BaseBiome> biomes = new HashSet<BaseBiome>();
-                String[] biomesList = component.substring(1).split(",");
+                String[] biomesList = input.substring(1).split(",");
                 BiomeRegistry biomeRegistry = context.requireWorld().getWorldData().getBiomeRegistry();
                 List<BaseBiome> knownBiomes = biomeRegistry.getBiomes();
                 for (String biomeName : biomesList) {
                     BaseBiome biome = Biomes.findBiomeByName(knownBiomes, biomeName, biomeRegistry);
                     if (biome == null) {
-                        throw new InputParseException("Unknown biome '" + biomeName + "'");
+                        throw new SuggestInputParseException(input, "$<biome>");
                     }
                     biomes.add(biome);
                 }
-
                 return Masks.asMask(new BiomeMask2D(context.requireExtent(), biomes));
 
             case '%':
                 try {
-                    double i = Math.abs(Expression.compile(component.substring(1)).evaluate());
+                    double i = Math.abs(Expression.compile(input.substring(1)).evaluate());
                     return new NoiseFilter(new RandomNoise(), (i) / 100);
                 } catch (NumberFormatException | ExpressionException e) {
-                    throw new InputParseException("Unknown percentage '" + component.substring(1) + "'");
+                    throw new SuggestInputParseException(input, "%<percent>");
                 }
             case '=':
                 try {
-                    Expression exp = Expression.compile(component.substring(1), "x", "y", "z");
+                    Expression exp = Expression.compile(input.substring(1), "x", "y", "z");
                     WorldEditExpressionEnvironment env = new WorldEditExpressionEnvironment(
                             Request.request().getEditSession(), Vector.ONE, Vector.ZERO);
                     exp.setEnvironment(env);
                     return new ExpressionMask(exp);
                 } catch (ExpressionException e) {
-                    throw new InputParseException("Invalid expression: " + e.getMessage());
+                    throw new SuggestInputParseException(input, "=<expression>");
                 }
 
             case '!':
-                if (component.length() > 1) {
+                if (input.length() > 1) {
-                    return Masks.negate(getBlockMaskComponent(masks, component.substring(1), context));
+                    return Masks.negate(getBlockMaskComponent(masks, input.substring(1), context));
                 }
-
+                throw new SuggestInputParseException(input, "!<mask>");
             default:
                 for (CustomMask mask : customMasks) {
-                    if (mask.accepts(component)) {
+                    if (mask.accepts(input)) {
                         try {
                             Constructor<? extends CustomMask> constructor = mask.getClass().getDeclaredConstructor(List.class, String.class, ParserContext.class);
-                            return constructor.newInstance(masks, component, context);
+                            return constructor.newInstance(masks, input, context);
                         } catch (Throwable e) {
                             e.printStackTrace();
                         }
                     }
                 }
-
+                List<String> split = split(input, ',');
+                if (split.size() == 1) {
                     ParserContext tempContext = new ParserContext(context);
                     tempContext.setRestricted(false);
                     tempContext.setPreferringWildcard(true);
-                return new BlockMask(extent, worldEdit.getBlockFactory().parseFromListInput(component, tempContext));
+                    return new BlockMask(extent, worldEdit.getBlockFactory().parseFromListInput(input, tempContext));
+                }
+                HashSet<BaseBlock> blocks = new HashSet<BaseBlock>();
+                ArrayList<Mask> maskUnion = new ArrayList<Mask>();
+                for (String elem : split) {
+                    ArrayList<Mask> list = new ArrayList<Mask>();
+                    list.add(catchSuggestion(input, list, elem, context));
+                    if (list.size() == 1) {
+                        Mask mask = list.get(0);
+                        if (mask instanceof BlockMask) {
+                            blocks.addAll(((BlockMask) mask).getBlocks());
+                        } else {
+                            maskUnion.add(mask);
+                        }
+                    }
+                }
+                if (!blocks.isEmpty()) {
+                    maskUnion.add(new BlockMask(extent, blocks));
+                }
+                if (maskUnion.size() == 1) {
+                    return maskUnion.get(0);
+                }
+                return new MaskUnion(maskUnion);
         }
     }
 

core/src/main/java/com/sk89q/worldedit/extension/factory/HashTagPatternParser.java

@@ -145,10 +145,10 @@ public class HashTagPatternParser extends FaweParser<Pattern> {
                         case "#offset":
                             try {
                                 List<String> split3 = suggestRemaining(rest, "#offset", "<dx>", "<dy>", "<dz>", "<pattern>");
-                                int x = (int) Math.abs(Expression.compile(split3.get(0)).evaluate());
+                                int x = (int) Expression.compile(split3.get(0)).evaluate();
-                                int y = (int) Math.abs(Expression.compile(split3.get(1)).evaluate());
+                                int y = (int) Expression.compile(split3.get(1)).evaluate();
-                                int z = (int) Math.abs(Expression.compile(split3.get(2)).evaluate());
+                                int z = (int) Expression.compile(split3.get(2)).evaluate();
-                                rest = StringMan.join(split3.subList(3, split3.size() - 1), ":");
+                                rest = StringMan.join(split3.subList(3, split3.size()), ":");
                                 Pattern pattern = catchSuggestion(input, rest, context);
                                 return new OffsetPattern(pattern, x, y, z);
                             } catch (NumberFormatException | ExpressionException | IndexOutOfBoundsException e) {
@@ -160,7 +160,7 @@ public class HashTagPatternParser extends FaweParser<Pattern> {
                                 int x = (int) Math.abs(Expression.compile(split3.get(0)).evaluate());
                                 int y = (int) Math.abs(Expression.compile(split3.get(1)).evaluate());
                                 int z = (int) Math.abs(Expression.compile(split3.get(2)).evaluate());
-                                rest = StringMan.join(split3.subList(3, split3.size() - 1), ":");
+                                rest = StringMan.join(split3.subList(3, split3.size()), ":");
                                 Pattern pattern = catchSuggestion(input, rest, context);
                                 return new SurfaceRandomOffsetPattern(pattern, x, y, z);
                             } catch (NumberFormatException | ExpressionException | IndexOutOfBoundsException e) {
@@ -173,7 +173,7 @@ public class HashTagPatternParser extends FaweParser<Pattern> {
                                 int x = (int) Math.abs(Expression.compile(split3.get(0)).evaluate());
                                 int y = (int) Math.abs(Expression.compile(split3.get(1)).evaluate());
                                 int z = (int) Math.abs(Expression.compile(split3.get(2)).evaluate());
-                                rest = StringMan.join(split3.subList(3, split3.size() - 1), ":");
+                                rest = StringMan.join(split3.subList(3, split3.size()), ":");
                                 Pattern pattern = catchSuggestion(input, rest, context);
                                 return new SolidRandomOffsetPattern(pattern, x, y, z);
                             } catch (NumberFormatException | ExpressionException | IndexOutOfBoundsException e) {
@@ -187,7 +187,7 @@ public class HashTagPatternParser extends FaweParser<Pattern> {
                                 int x = (int) Math.abs(Expression.compile(split3.get(0)).evaluate());
                                 int y = (int) Math.abs(Expression.compile(split3.get(1)).evaluate());
                                 int z = (int) Math.abs(Expression.compile(split3.get(2)).evaluate());
-                                rest = StringMan.join(split3.subList(3, split3.size() - 1), ":");
+                                rest = StringMan.join(split3.subList(3, split3.size()), ":");
                                 Pattern pattern = catchSuggestion(input, rest, context);
                                 return new RandomOffsetPattern(pattern, x, y, z);
                             } catch (NumberFormatException | ExpressionException | IndexOutOfBoundsException e) {

core/src/main/java/com/sk89q/worldedit/extension/platform/CommandManager.java

@@ -21,6 +21,7 @@ package com.sk89q.worldedit.extension.platform;
 
 import com.boydti.fawe.Fawe;
 import com.boydti.fawe.command.AnvilCommands;
+import com.boydti.fawe.command.MaskBinding;
 import com.boydti.fawe.command.PatternBinding;
 import com.boydti.fawe.config.BBC;
 import com.boydti.fawe.config.Settings;
@@ -130,6 +131,7 @@ public final class CommandManager {
         builder.addBinding(new WorldEditBinding(worldEdit));
 
         builder.addBinding(new PatternBinding(worldEdit), com.sk89q.worldedit.function.pattern.Pattern.class);
+        builder.addBinding(new MaskBinding(worldEdit), com.sk89q.worldedit.function.mask.Mask.class);
 
         builder.addInvokeListener(new LegacyCommandsHandler());
         builder.addInvokeListener(new CommandLoggingHandler(worldEdit, commandLog));

core/src/main/java/com/sk89q/worldedit/extent/AbstractDelegateExtent.java

@@ -19,10 +19,12 @@
 
 package com.sk89q.worldedit.extent;
 
+import com.boydti.fawe.object.extent.LightingExtent;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
+import com.sk89q.worldedit.blocks.BlockMaterial;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.function.operation.Operation;
@@ -30,6 +32,7 @@ import com.sk89q.worldedit.function.operation.OperationQueue;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.registry.BundledBlockData;
 import java.util.List;
 import javax.annotation.Nullable;
 
@@ -39,7 +42,7 @@ import static com.google.common.base.Preconditions.checkNotNull;
 /**
  * A base class for {@link Extent}s that merely passes extents onto another.
  */
-public abstract class AbstractDelegateExtent implements Extent {
+public abstract class AbstractDelegateExtent implements LightingExtent {
 
     private final Extent extent;
 
@@ -53,6 +56,50 @@ public abstract class AbstractDelegateExtent implements Extent {
         this.extent = extent;
     }
 
+    public int getSkyLight(int x, int y, int z) {
+        if (extent instanceof LightingExtent) {
+            return ((LightingExtent) extent).getSkyLight(x, y, z);
+        }
+        return 0;
+    }
+
+    public int getBlockLight(int x, int y, int z) {
+        if (extent instanceof LightingExtent) {
+            return ((LightingExtent) extent).getBlockLight(x, y, z);
+        }
+        return getBrightness(x, y, z);
+    }
+
+    public int getOpacity(int x, int y, int z) {
+        if (extent instanceof LightingExtent) {
+            return ((LightingExtent) extent).getOpacity(x, y, z);
+        }
+        BlockMaterial block = BundledBlockData.getInstance().getMaterialById(getLazyBlock(x, y, z).getId());
+        if (block == null) {
+            return 15;
+        }
+        return Math.min(15, block.getLightOpacity());
+    }
+
+    @Override
+    public int getLight(int x, int y, int z) {
+        if (extent instanceof LightingExtent) {
+            return ((LightingExtent) extent).getLight(x, y, z);
+        }
+        return 0;
+    }
+
+    public int getBrightness(int x, int y, int z) {
+        if (extent instanceof LightingExtent) {
+            return ((LightingExtent) extent).getBrightness(x, y, z);
+        }
+        BlockMaterial block = BundledBlockData.getInstance().getMaterialById(getLazyBlock(x, y, z).getId());
+        if (block == null) {
+            return 15;
+        }
+        return Math.min(15, block.getLightValue());
+    }
+
     /**
      * Get the extent.
      *

core/src/main/java/com/sk89q/worldedit/extent/clipboard/BlockArrayClipboard.java

@@ -23,18 +23,21 @@ import com.boydti.fawe.config.Settings;
 import com.boydti.fawe.object.clipboard.DiskOptimizedClipboard;
 import com.boydti.fawe.object.clipboard.FaweClipboard;
 import com.boydti.fawe.object.clipboard.MemoryOptimizedClipboard;
+import com.boydti.fawe.object.extent.LightingExtent;
 import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.Vector2D;
 import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseBlock;
+import com.sk89q.worldedit.blocks.BlockMaterial;
 import com.sk89q.worldedit.entity.BaseEntity;
 import com.sk89q.worldedit.entity.Entity;
 import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.regions.Region;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.world.biome.BaseBiome;
+import com.sk89q.worldedit.world.registry.BundledBlockData;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -48,7 +51,7 @@ import static com.google.common.base.Preconditions.checkNotNull;
  * Stores block data as a multi-dimensional array of {@link BaseBlock}s and
  * other data as lists or maps.
  */
-public class BlockArrayClipboard implements Clipboard {
+public class BlockArrayClipboard implements Clipboard, LightingExtent {
 
     private Region region;
     public FaweClipboard IMP;
@@ -57,6 +60,7 @@ public class BlockArrayClipboard implements Clipboard {
     private int my;
     private int mz;
     private Vector origin;
+    private Vector mutable = new Vector();
 
     public BlockArrayClipboard(Region region) {
         checkNotNull(region);
@@ -227,4 +231,43 @@ public class BlockArrayClipboard implements Clipboard {
     public static Class<?> inject() {
         return BlockArrayClipboard.class;
     }
+
+    @Override
+    public int getLight(int x, int y, int z) {
+        return getBlockLight(x, y, z);
+    }
+
+    @Override
+    public int getSkyLight(int x, int y, int z) {
+        return 0;
+    }
+
+    @Override
+    public int getBlockLight(int x, int y, int z) {
+        return getBrightness(x, y, z);
+    }
+
+    @Override
+    public int getOpacity(int x, int y, int z) {
+        mutable.x = x;
+        mutable.y = y;
+        mutable.z = z;
+        BlockMaterial block = BundledBlockData.getInstance().getMaterialById(getBlock(mutable).getId());
+        if (block == null) {
+            return 15;
+        }
+        return Math.min(15, block.getLightOpacity());
+    }
+
+    @Override
+    public int getBrightness(int x, int y, int z) {
+        mutable.x = x;
+        mutable.y = y;
+        mutable.z = z;
+        BlockMaterial block = BundledBlockData.getInstance().getMaterialById(getBlock(mutable).getId());
+        if (block == null) {
+            return 15;
+        }
+        return Math.min(15, block.getLightValue());
+    }
 }

core/src/main/java/com/sk89q/worldedit/session/PasteBuilder.java

@@ -19,11 +19,14 @@
 
 package com.sk89q.worldedit.session;
 
+import com.boydti.fawe.util.MaskTraverser;
+import com.sk89q.worldedit.EditSession;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import com.sk89q.worldedit.extent.transform.BlockTransformExtent;
 import com.sk89q.worldedit.function.mask.ExistingBlockMask;
+import com.sk89q.worldedit.function.mask.Mask;
 import com.sk89q.worldedit.function.operation.ForwardExtentCopy;
 import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.math.transform.Transform;
@@ -97,6 +100,14 @@ public class PasteBuilder {
         }
         ForwardExtentCopy copy = new ForwardExtentCopy(extent, clipboard.getRegion(), clipboard.getOrigin(), targetExtent, to);
         copy.setTransform(transform);
+        if (targetExtent instanceof EditSession) {
+            Mask sourceMask = ((EditSession) targetExtent).getSourceMask();
+            if (sourceMask != null) {
+                new MaskTraverser(sourceMask).reset(extent);
+                copy.setSourceMask(sourceMask);
+                ((EditSession) targetExtent).setSourceMask(null);
+            }
+        }
         if (ignoreAirBlocks) {
             copy.setSourceMask(new ExistingBlockMask(clipboard));
         }