diff --git a/core/src/main/java/com/boydti/fawe/object/pattern/IdDataMaskPattern.java b/core/src/main/java/com/boydti/fawe/object/pattern/IdDataMaskPattern.java
new file mode 100644
index 00000000..943d6d15
--- /dev/null
+++ b/core/src/main/java/com/boydti/fawe/object/pattern/IdDataMaskPattern.java
@@ -0,0 +1,29 @@
+package com.boydti.fawe.object.pattern;
+
+import com.boydti.fawe.FaweCache;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.blocks.BaseBlock;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.function.pattern.AbstractPattern;
+import com.sk89q.worldedit.function.pattern.Pattern;
+
+public class IdDataMaskPattern extends AbstractPattern {
+    private final Extent extent;
+    private final Pattern pattern;
+    private final int mask;
+
+    public IdDataMaskPattern(Extent extent, Pattern parent, int mask) {
+        this.extent = extent;
+        this.pattern = parent;
+        this.mask = mask;
+    }
+
+    @Override
+    public BaseBlock apply(Vector position) {
+        BaseBlock oldBlock = extent.getBlock(position);
+        BaseBlock newBlock = pattern.apply(position);
+        int oldData = oldBlock.getData();
+        int newData = newBlock.getData() + oldData - (oldData & mask);
+        return FaweCache.getBlock(newBlock.getId(), newData);
+    }
+}
diff --git a/core/src/main/java/com/sk89q/worldedit/extension/factory/HashTagPatternParser.java b/core/src/main/java/com/sk89q/worldedit/extension/factory/HashTagPatternParser.java
index 68f8d3a6..48dccee0 100644
--- a/core/src/main/java/com/sk89q/worldedit/extension/factory/HashTagPatternParser.java
+++ b/core/src/main/java/com/sk89q/worldedit/extension/factory/HashTagPatternParser.java
@@ -7,6 +7,7 @@ import com.boydti.fawe.object.pattern.DataPattern;
 import com.boydti.fawe.object.pattern.ExistingPattern;
 import com.boydti.fawe.object.pattern.ExpressionPattern;
 import com.boydti.fawe.object.pattern.FullClipboardPattern;
+import com.boydti.fawe.object.pattern.IdDataMaskPattern;
 import com.boydti.fawe.object.pattern.IdPattern;
 import com.boydti.fawe.object.pattern.Linear3DBlockPattern;
 import com.boydti.fawe.object.pattern.LinearBlockPattern;
@@ -168,6 +169,14 @@ public class HashTagPatternParser extends FaweParser<Pattern> {
                             throw new InputParseException("No session is available, so no clipboard is available");
                         }
                     }
+                    case "#iddatamask": {
+                        String[] split = rest.split(":", 1);
+                        if (split.length != 2) {
+                            throw new InputParseException("#iddatamask:<mask>:<pattern>");
+                        }
+                        int mask = Integer.parseInt(split[0]);
+                        return new IdDataMaskPattern(Request.request().getExtent(), catchSuggestion(input, split[1], context), mask);
+                    }
                     case "#id": {
                         return new IdPattern(Request.request().getExtent(), catchSuggestion(input, rest, context));
                     }