Using the Info Tool

The simplest way to get the actual ID of a block added by a mod is to use WorldEdit's info tool. To use the info tool, do the following:

1. Place the block you want to set
2. Hold any item in your hand (not a block)
3. Run the /info command, turning the item in your hand into the “Info Tool”
4. Right-click the block you want to find the ID of while holding the item
5. The chat will have a message that has both the #id and [data] values
   • If it says #991 and [5], the block's ID is 991:5
6. Use that ID in the WorldEdit command

Using the clipboard pattern

Sometimes mod blocks have extra data that they require to work. Using the ID isn't good enough in these cases, but there are ways to use the block still.

WorldEdit accepts #clipboard in place of a block ID, allowing you to //copy something and then use that block. This feature is called the Clipboard Pattern.

While intended for setting intricate patterns or structures, this system also works to set mod blocks containing extra data.

To do this, select the block you want to use with the selection wand and run //copy. Then you can use #clipboard in place of block IDs in practically any WorldEdit command. For example, //set #clipboard.

Using the hand pattern

Finally, most simple blocks can also be set with WorldEdit directly from the inventory. WorldEdit accepts hand in place of the block ID and interprets that as using the block ID equivalent to the currently held item. This means you can hold a block in your hand, and type //set hand to set all the blocks in the selected region to the block you’re holding. This works with practically all WorldEdit commands that accept block IDs.

Notes

Do note that if you're running a hybrid server that allows both Bukkit plugins and Forge mods, it's necessary to install both the WorldEdit mod and plugin. Hybrid servers can often cause other issues, though, and are generally not recommended.