One Chunk Biomes
by JoraSH10
With One Chunk Biomes installed, each chunk of a server's terrain can take its own biome, and the layout is set when new chunks are generated.
What it does
Rather than large biome regions spread over wide parts of the map, the mod assigns a biome at chunk scale. Every chunk can turn into a different biome, which yields a chaotic patchwork world with sharp biome borders and odd transitions between terrain types. Routes through such a world tend to be unusual, since neighboring areas rarely share a climate or vegetation.
The mod suits anyone seeking an experimental, unpredictable generation style instead of standard biome layouts. It affects newly generated terrain only: chunks created before installation keep their original biomes. The environment is server-side only, so players join without installing anything, and the server alone needs the Fabric build, with the MIT License covering the code. The project is not open source.
Files exist for Fabric across 10 release versions, covering 1.16.5 – 1.21.11. The latest Fabric file is 1.0.0+1.21.4 for 1.21.4, published on 2026-04-19, after a first release on 2026-04-05.
Key features
Chunk-scale biome assignment
Each chunk is assigned its own biome, so biome boundaries follow the chunk grid rather than large regions.
Patchwork terrain
Neighboring chunks often belong to unrelated biomes, creating sharp borders and abrupt changes in terrain and vegetation.
Newly generated terrain only
Chunks generated before the mod was installed are not changed, so the effect appears only in fresh areas of the world.
Unusual survival routes
Travel across a patchwork world means crossing unfamiliar climates, which changes how players plan routes through a map.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x3 of 3 versions with builds
1.20.x3 of 3 versions with builds
1.19.x1 of 1 version with builds
1.18.x1 of 1 version with builds
1.17.x1 of 1 version with builds
1.16.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners and players looking for an experimental world generation style with sharp biome borders and unpredictable terrain, rather than the standard large biome layouts of vanilla generation.
How it compares
Skychunk is a client and server mod for Fabric and Forge, open source under the MIT License, with files for 1.16.2 – 1.21.1. Random chunks is server-side only, uses the MIT License without being open source, and targets 1.21 – 1.21.11 on Fabric. Both alternatives are chunk-based, but One Chunk Biomes is server-side only on Fabric across a wider range of game versions.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| One Chunk Biomes | Fabric | 1.16.5 – 1.21.11 | Server-side only | 2026-04-19 |
| Skychunk | Fabric and Forge | 1.16.2 – 1.21.1 | Client and server | 2026-08-15 |
| Random chunks | Fabric | 1.21 – 1.21.11 | Server-side only | 2026-02-08 |
Questions
Does One Chunk Biomes need to be installed on the client?
Will the mod change terrain that already exists?
Which loader is One Chunk Biomes published for?
In the catalog
One Chunk Biomes is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 19,862 mods support Minecraft 1.21.11.
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What the author says
One Chunk Biomes turns world generation into a chunk-by-chunk biome mosaic. Instead of large biome regions stretching across huge parts of the map, this mod assigns biomes at chunk scale. Every chunk can become a different biome, which creates a chaotic patchwork world full of sharp biome borders, strange…
Official listing
- Modrinth page
- modrinth.com/mod/one-chunk-biomes
- Owner
- JoraSH10
- Published
- 2026-04-05
- Updated on Modrinth
- 2026-04-19
- Facts verified
- 2026-10-15