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Biolith is a biome placement and world surface generation server library mod focusing on configurability and consistent, immersive distribution of modded biomes. Fabric and Quilt loaders are presently supported (Quilt testing remains a bit light at the moment). You can see Biolith in action by trying out the 1.20 releases of Terraformers biome mods listed below:

Warning: Somewhat Experimental

This mod is still somewhat experimental. Biome selection strategies may change, resulting in biomes being placed at different locations in existing worlds.

Extent of Current Features

At this time, aside from any new things I've implemented and forgotten to update here, the following features are present:

  • From v1.2.0-alpha.1, Biolith supports all four major mod loaders!
  • From v2.0.0-alpha.1, biome placement and surface rules can be added via datapacks.
  • Place an Overworld, Nether, or End biome at a specified noise point.
  • Remove a vanilla/datapack Overworld, Nether, or End biome from all noise points.
  • Replace an Overworld, Nether, or End biome entirely or in part.
  • Add a sub-biome to an Overworld, Nether, End, or modded biome.
    • (End biome placement uses custom noise and is only available in 1.20+.)

  • Register custom surface rules.
  • Override vanilla surfaces using custom surface builders.

  • Fully compatible with TerraBlender and Fabric Biome API biomes.
  • Somewhat compatible with BClib (biome placement will be modified by BClib).
  • Can place biomes in Modern Beta worlds since 1.2.0-beta.1.

External resources

Project members






Technical information

Client side
Server side
Project ID