CaveBiomesAPI
Mod adding custom world height limits and 3D biomes to 1.12.2!
- Loaders
- Forge
- Downloads on Modrinth
- 1.6K
- Followers on Modrinth
- 1
- versions
- 5
- Updated
- August 31, 2026Aug 31
- Published
- in 2026
At a glance
Needed both in the game and on the server
CaveBiomesAPI
!!! It is a library mod! By defaultmeans byte-for-byte vanilla behavior. Everything is opt-in. !!!
CaveBiomesAPI is a core/library mod for Minecraft 1.12.2 designed specifically for mod developers. It significantly expands the vanilla world generation capabilities by introducing vertical (3D) biomes and custom world height limits.
If you've ever wanted to create massive underground ecosystems with different biomes stacked beneath the surface, or high mountains scrapping the sky, this API is for you!
Features
- Vertical Biomes (3D Biomes): Allows developers to generate completely different biomes at varying Y-levels (heights) in the same column. You can easily stack different biomes one under another (e.g., a lush surface biome with a glowing mushroom cave biome directly underneath).
- World Height Configuration: Gives modders the ability to easily configure and extend the world height limits in 1.12.2.
- Developer-Friendly: Provides a clean and accessible API to integrate complex underground world generation into your own mods.
Requirements
- Minecraft 1.12.2 / Forge 14.23.5.2864
- MixinBootstrap (runtime dependency)
For Developers
- Check the GitHub repo for API documentation and examples
FAQ
How to install CaveBiomesAPI?
Install Forge for your Minecraft version, download CaveBiomesAPI for the same version and loader, put the file into the mods folder and launch the game with the loader profile.
Which Minecraft versions does CaveBiomesAPI support?
CaveBiomesAPI has builds for Minecraft 1.12.2.
Is CaveBiomesAPI needed on the server?
Needed in the game and on the server