Customizing Where Structures Spawn (Biome and Dimension Rules)

Setting Biome Restrictions

By default, structures spawn across many biomes. You can limit them to specific environments so castles don't appear in deserts and dungeons only spawn underground where appropriate.

Steps:

1. Type /rc gui to open the structure manager

2. Select the structure you want to customize

3. Find the biome rules section

4. Add or remove biomes from the spawn list

5. Save your changes

Controlling Dimension and Terrain Spawning

You can also restrict structures to specific dimensions (Overworld, Nether, End) and terrain types. This prevents floating castles in oceans and keeps underground dungeons from spawning on mountains.

The mod avoids complex file editing—all these rules are adjustable through the in-game GUI. After changing settings, new chunks will respect your rules. Existing generated structures won't change, so you can safely experiment with different configurations. Test your rules using /#structures locate to verify structures appear only where intended.