Add some experimental brush commands.

/br set <shape> <radius> <pattern>
/br deform <shape> <expression>
/br scatter <shape> <density> <generator>
/br apply <shape> <generator>

<shape> can be: cuboid, cyl[inder], sphere

<density> is 0-100

<generator> can be:
forest|tree <type>
item <item>[:<data>] (ONLY WORKS ON FORGE)

Examples:

/br deform cuboid 5 y-=0.2
/br scatter sphere 5 100 minecraft:dye:15

worldedit-core/src/main/java/com/sk89q/worldedit/world/registry/ItemRegistry.java

@@ -0,0 +1,46 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world.registry;
+
+import com.sk89q.worldedit.blocks.BaseItem;
+
+import javax.annotation.Nullable;
+
+public interface ItemRegistry {
+
+    /**
+     * Create a new item using its ID.
+     *
+     * @param id the id
+     * @return the item, which may be null if no item exists
+     */
+    @Nullable
+    BaseItem createFromId(String id);
+
+    /**
+     * Create a new item using its legacy numeric ID.
+     *
+     * @param id the id
+     * @return the item, which may be null if no item exists
+     */
+    @Nullable
+    BaseItem createFromId(int id);
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/world/registry/LegacyWorldData.java

@@ -27,6 +27,7 @@ public class LegacyWorldData implements WorldData {
 
     private static final LegacyWorldData INSTANCE = new LegacyWorldData();
     private final LegacyBlockRegistry blockRegistry = new LegacyBlockRegistry();
+    private final NullItemRegistry itemRegistry = new NullItemRegistry();
     private final NullEntityRegistry entityRegistry = new NullEntityRegistry();
     private final NullBiomeRegistry biomeRegistry = new NullBiomeRegistry();
 
@@ -41,6 +42,11 @@ public class LegacyWorldData implements WorldData {
         return blockRegistry;
     }
 
+    @Override
+    public ItemRegistry getItemRegistry() {
+        return itemRegistry;
+    }
+
     @Override
     public EntityRegistry getEntityRegistry() {
         return entityRegistry;

worldedit-core/src/main/java/com/sk89q/worldedit/world/registry/NullItemRegistry.java

@@ -0,0 +1,40 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.world.registry;
+
+import com.sk89q.worldedit.blocks.BaseItem;
+
+import javax.annotation.Nullable;
+
+public class NullItemRegistry implements ItemRegistry {
+
+    @Nullable
+    @Override
+    public BaseItem createFromId(String id) {
+        return null;
+    }
+
+    @Nullable
+    @Override
+    public BaseItem createFromId(int id) {
+        return null;
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/world/registry/WorldData.java

@@ -32,6 +32,13 @@ public interface WorldData {
      */
     BlockRegistry getBlockRegistry();
 
+    /**
+     * Get the item registry.
+     *
+     * @return the item registry
+     */
+    ItemRegistry getItemRegistry();
+
     /**
      * Get the entity registry.
      *