What it does
Cross a chunk border and the whole 16 by 16 column changes at once. Stone, dirt, ores, trees, water and lava all become the new block, whether that's diamond ore, glass, slime or melon. Air stays air, so caves, ravines and the sky keep their shape.
Each chunk changes once. Walk back later and it's still the block it got the first time, even after a restart. It happens around everyone who's playing, so in a group the world changes wherever anyone goes.
Details
- 380 blocks in the pool on Java 26.1, leaves included, and leaves placed this way never decay. TNT, pistons, spawners, infested stone and blocks that hold items are left out.
- The spots where players are standing stay empty, so nobody gets buried when their chunk changes.
- Bedrock, Nether portals with their obsidian frames, End portals and their frames are never replaced, so you can still travel between dimensions. Command blocks, barriers and structure blocks are left alone too.
- When a chunk changes you hear the new block being placed around you.
- On Bedrock, operators get a Random Chunks item the first time they join. Use it to turn it on, and again to turn it off. You keep it when you die.
Commands
| Command | What it does |
|---|---|
/randomchunks start | Turn it on. The chunk you're standing in changes straight away. |
/randomchunks stop | Turn it off. Chunks that already changed stay changed. |
/rchunks start|stop | Short for /randomchunks. |
Limits
- On Java, the commands need operator level 2. On Bedrock, they need operator permission, and cheats can stay off.
- Spectators don't change chunks.
- The Bedrock add-on needs Minecraft 1.21.100 or newer.