How to Prototype Builds Locally with Ghost Blocks

Because every command in Void Commands Mod runs strictly on your client, you can draft structures, test block palettes, and place temporary markers on multiplayer servers without changing the world for anyone else.

Placing Blocks via Chat Commands

To change a single block on your screen, open chat and run /vsetblock with your target coordinates and block type. For larger walls, floors, or clearings, use /vfill [hollow|keep|outline|replace] [block]. This command uses standard vanilla /fill syntax, meaning you can enter two corner coordinates, choose a fill mode such as hollow, keep, outline, or replace, and preview massive changes locally before spending real materials.

Building by Hand with Ghost Items

If you prefer placing blocks manually instead of typing coordinates, combine item spawning with packet blocking:

1. Run /vget in chat to give yourself a ghost item for the block you want to test. Be aware that if you are playing in Creative mode, the item only remains a ghost until you use it.

2. Run /vghostplacement to toggle off block interaction packets. While active, placing blocks in your hand will not send packets to the server, keeping your placement local.

3. When you finish planning your build, run /vghostplacement a second time so your normal block placements and interactions register on the server again.