How to Change Nether Roof Limits and Dimension Access

Managing Allowed Dimensions

Out of the box, all standard vanilla dimensions—the Overworld, the Nether, and the End—are included on the approved teleport list. This means players can run /trigger rtp in any of these dimensions right away.

If you want to restrict where players are allowed to randomly teleport, log in as a server operator and run /function clean_rtp:__config. From the interactive chat menu that appears, locate the dimension limits section and toggle which dimensions are approved for random teleportation.

Toggling the Nether Height Cap

In a standard world, the Nether has a bedrock ceiling at Y level 128. To keep players safe during a random teleport, the data pack caps the Nether teleport height at Y level 126 by default so nobody spawns trapped on top of the bedrock roof.

However, if your server uses custom world generation that raises the Nether ceiling, you can expand the vertical search range:

1. Run /function clean_rtp:__config as an operator.

2. Look for the Nether height limit setting in the chat menu.

3. Toggle the height cap from the default Y 126 up to Y 254 to support your custom terrain.