diff --git a/src/main/java/com/sk89q/worldedit/WorldEdit.java b/src/main/java/com/sk89q/worldedit/WorldEdit.java
index afda8b67a..ea89a7845 100644
--- a/src/main/java/com/sk89q/worldedit/WorldEdit.java
+++ b/src/main/java/com/sk89q/worldedit/WorldEdit.java
@@ -84,6 +84,7 @@ import com.sk89q.worldedit.masks.InvertedMask;
 import com.sk89q.worldedit.masks.Mask;
 import com.sk89q.worldedit.masks.RandomMask;
 import com.sk89q.worldedit.masks.RegionMask;
+import com.sk89q.worldedit.masks.SolidBlockMask;
 import com.sk89q.worldedit.masks.UnderOverlayMask;
 import com.sk89q.worldedit.patterns.BlockChance;
 import com.sk89q.worldedit.patterns.ClipboardPattern;
@@ -731,6 +732,8 @@ public class WorldEdit {
         case '#':
             if (component.equalsIgnoreCase("#existing")) {
                 return new ExistingBlockMask();
+            } else if (component.equalsIgnoreCase("#solid")) {
+                return new SolidBlockMask();
             } else if (component.equalsIgnoreCase("#dregion")
                     || component.equalsIgnoreCase("#dselection")
                     || component.equalsIgnoreCase("#dsel")) {
diff --git a/src/main/java/com/sk89q/worldedit/masks/AbstractMask.java b/src/main/java/com/sk89q/worldedit/masks/AbstractMask.java
new file mode 100644
index 000000000..0be57ccab
--- /dev/null
+++ b/src/main/java/com/sk89q/worldedit/masks/AbstractMask.java
@@ -0,0 +1,11 @@
+package com.sk89q.worldedit.masks;
+
+import com.sk89q.worldedit.LocalPlayer;
+import com.sk89q.worldedit.LocalSession;
+import com.sk89q.worldedit.Vector;
+
+public abstract class AbstractMask implements Mask {
+    @Override
+    public void prepare(LocalSession session, LocalPlayer player, Vector target) {
+    }
+}
diff --git a/src/main/java/com/sk89q/worldedit/masks/BiomeTypeMask.java b/src/main/java/com/sk89q/worldedit/masks/BiomeTypeMask.java
index d86ac3334..c7d36e92b 100644
--- a/src/main/java/com/sk89q/worldedit/masks/BiomeTypeMask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/BiomeTypeMask.java
@@ -5,12 +5,10 @@ import java.util.Set;
 
 import com.sk89q.worldedit.BiomeType;
 import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.LocalPlayer;
-import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.Vector2D;
 
-public class BiomeTypeMask implements Mask {
+public class BiomeTypeMask extends AbstractMask {
     private final Set<BiomeType> biomes;
 
     public BiomeTypeMask() {
@@ -21,9 +19,6 @@ public class BiomeTypeMask implements Mask {
         this.biomes = biomes;
     }
 
-    public void prepare(LocalSession session, LocalPlayer player, Vector target) {
-    }
-
     public boolean matches2D(EditSession editSession, Vector2D pos) {
         BiomeType biome = editSession.getWorld().getBiome(pos);
         return biomes.contains(biome);
diff --git a/src/main/java/com/sk89q/worldedit/masks/BlockMask.java b/src/main/java/com/sk89q/worldedit/masks/BlockMask.java
index 95bca93c2..e852a9990 100644
--- a/src/main/java/com/sk89q/worldedit/masks/BlockMask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/BlockMask.java
@@ -5,12 +5,10 @@ import java.util.HashSet;
 import java.util.Set;
 
 import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.LocalPlayer;
-import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.blocks.BaseBlock;
 
-public class BlockMask implements Mask {
+public class BlockMask extends AbstractMask {
     private final Set<BaseBlock> blocks;
 
     public BlockMask() {
@@ -34,9 +32,6 @@ public class BlockMask implements Mask {
         blocks.addAll(blocks);
     }
 
-    public void prepare(LocalSession session, LocalPlayer player, Vector target) {
-    }
-
     @Override
     public boolean matches(EditSession editSession, Vector pos) {
         BaseBlock block = editSession.getBlock(pos);
diff --git a/src/main/java/com/sk89q/worldedit/masks/CombinedMask.java b/src/main/java/com/sk89q/worldedit/masks/CombinedMask.java
index 148557830..fb12c8246 100644
--- a/src/main/java/com/sk89q/worldedit/masks/CombinedMask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/CombinedMask.java
@@ -26,7 +26,7 @@ import com.sk89q.worldedit.LocalPlayer;
 import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.Vector;
 
-public class CombinedMask implements Mask {
+public class CombinedMask extends AbstractMask {
     private final List<Mask> masks = new ArrayList<Mask>();
 
     public CombinedMask() {
diff --git a/src/main/java/com/sk89q/worldedit/masks/ExistingBlockMask.java b/src/main/java/com/sk89q/worldedit/masks/ExistingBlockMask.java
index d32de39fa..ea9e8f448 100644
--- a/src/main/java/com/sk89q/worldedit/masks/ExistingBlockMask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/ExistingBlockMask.java
@@ -20,15 +20,10 @@
 package com.sk89q.worldedit.masks;
 
 import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.LocalPlayer;
-import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.blocks.BlockID;
 
-public class ExistingBlockMask implements Mask {
-    public void prepare(LocalSession session, LocalPlayer player, Vector target) {
-    }
-
+public class ExistingBlockMask extends AbstractMask {
     @Override
     public boolean matches(EditSession editSession, Vector pos) {
         return editSession.getBlockType(pos) != BlockID.AIR;
diff --git a/src/main/java/com/sk89q/worldedit/masks/InvertedMask.java b/src/main/java/com/sk89q/worldedit/masks/InvertedMask.java
index e58db6ed3..9ffc5213e 100644
--- a/src/main/java/com/sk89q/worldedit/masks/InvertedMask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/InvertedMask.java
@@ -5,7 +5,7 @@ import com.sk89q.worldedit.LocalPlayer;
 import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.Vector;
 
-public class InvertedMask implements Mask {
+public class InvertedMask extends AbstractMask {
     private final Mask mask;
 
     public InvertedMask(Mask mask) {
diff --git a/src/main/java/com/sk89q/worldedit/masks/Mask.java b/src/main/java/com/sk89q/worldedit/masks/Mask.java
index 277e61f94..d5a448736 100644
--- a/src/main/java/com/sk89q/worldedit/masks/Mask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/Mask.java
@@ -26,7 +26,9 @@ import com.sk89q.worldedit.Vector;
 
 /**
  * Base matcher for the block filtering framework. Implementing classes
- * can be used to filter blocks to set or replace
+ * can be used to filter blocks to set or replace.
+ * <p>
+ * <u>Do NOT</u> implement this interface. Extend {@link AbstractMask} instead.
  *
  * @author sk89q
  */
diff --git a/src/main/java/com/sk89q/worldedit/masks/RandomMask.java b/src/main/java/com/sk89q/worldedit/masks/RandomMask.java
index 3425c6035..65c71af47 100644
--- a/src/main/java/com/sk89q/worldedit/masks/RandomMask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/RandomMask.java
@@ -1,21 +1,15 @@
 package com.sk89q.worldedit.masks;
 
 import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.LocalPlayer;
-import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.Vector;
 
-public class RandomMask implements Mask {
+public class RandomMask extends AbstractMask {
     private final double ratio;
 
     public RandomMask(double ratio) {
         this.ratio = ratio;
     }
 
-    @Override
-    public void prepare(LocalSession session, LocalPlayer player, Vector target) {
-    }
-
     @Override
     public boolean matches(EditSession editSession, Vector pos) {
         return Math.random() < ratio;
diff --git a/src/main/java/com/sk89q/worldedit/masks/RegionMask.java b/src/main/java/com/sk89q/worldedit/masks/RegionMask.java
index f9260dc07..b734e7ae3 100644
--- a/src/main/java/com/sk89q/worldedit/masks/RegionMask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/RegionMask.java
@@ -20,21 +20,16 @@
 package com.sk89q.worldedit.masks;
 
 import com.sk89q.worldedit.EditSession;
-import com.sk89q.worldedit.LocalPlayer;
-import com.sk89q.worldedit.LocalSession;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.regions.Region;
 
-public class RegionMask implements Mask {
+public class RegionMask extends AbstractMask {
     private final Region region;
 
     public RegionMask(Region region) {
         this.region = region.clone();
     }
 
-    public void prepare(LocalSession session, LocalPlayer player, Vector target) {
-    }
-
     @Override
     public boolean matches(EditSession editSession, Vector pos) {
         return region.contains(pos);
diff --git a/src/main/java/com/sk89q/worldedit/masks/SolidBlockMask.java b/src/main/java/com/sk89q/worldedit/masks/SolidBlockMask.java
new file mode 100644
index 000000000..f78170efc
--- /dev/null
+++ b/src/main/java/com/sk89q/worldedit/masks/SolidBlockMask.java
@@ -0,0 +1,15 @@
+package com.sk89q.worldedit.masks;
+
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.blocks.BlockType;
+
+/**
+ * Works like {@link ExistingBlockMask}, except also dealing with non-solid non-air blocks the same way as with air.
+ */
+public class SolidBlockMask extends AbstractMask {
+    @Override
+    public boolean matches(EditSession editSession, Vector pos) {
+        return !BlockType.canPassThrough(editSession.getBlockType(pos), editSession.getBlockData(pos));
+    }
+}
diff --git a/src/main/java/com/sk89q/worldedit/masks/UnderOverlayMask.java b/src/main/java/com/sk89q/worldedit/masks/UnderOverlayMask.java
index c84bbf47e..7c77a75da 100644
--- a/src/main/java/com/sk89q/worldedit/masks/UnderOverlayMask.java
+++ b/src/main/java/com/sk89q/worldedit/masks/UnderOverlayMask.java
@@ -31,7 +31,7 @@ import com.sk89q.worldedit.blocks.BaseBlock;
  *
  * @author 1337
  */
-public class UnderOverlayMask implements Mask {
+public class UnderOverlayMask extends AbstractMask {
     private final int yMod;
     private Mask mask;