WorldgenTweaks
by ringlocker
WorldgenTweaks is a small Fabric collection of world generation fixes that changes how steep terrain and snow are placed on server-side worlds.
What it does
Rather than adding new biomes or structures, the mod corrects several details of terrain generation. Steep slopes that would normally show their natural surface are replaced with stone, and snow is placed correctly under tree leaves so it no longer appears in the wrong spots. The changes apply when chunks are generated, so worlds that already exist keep their old terrain.
No required dependency is listed for Fabric. Because the environment is server-side only, players connecting to a server do not need to install anything. The source code and issue tracker are public, and the project is open source under the GNU General Public License v3.0 or later. Files cover 1.21.8 – 1.21.11 across four release versions, with 0.1 for 1.21.11 as the latest build, and snapshot builds are published as well.
Key features
Steep terrain replacement
Terrain that exceeds the steepness threshold is replaced with stone instead of the usual surface blocks.
Snow under leaves
Snow generates beneath tree leaves in the correct positions, fixing placement that previously appeared in the wrong places.
Steep condition fix
The mod fixes bug MC-258859, where the steep condition was met for cardinal directions it should not apply to.
Small tweak collection
Several independent worldgen adjustments are bundled together, each touching a narrow part of terrain generation.
Gallery
Compatibility
Latest build for each game version and loader.
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
How it compares
Steep Material Condition Fix is a Forge-only mod for 1.19.2 that also corrects the steep condition, and it is open source under the GNU General Public License v3.0 only. Snowy Trees is a Fabric mod for 1.18 – 1.18.2 that is open source under the MIT License and also runs server-side only, so it covers snow placement on an older version range.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| WorldgenTweaks | Fabric | 1.21.8 – 1.21.11 | Server-side only | 2025-12-21 |
| Steep Material Condition Fix | Forge | 1.19.2 | Server-side only | 2025-02-26 |
| Snowy Trees | Fabric | 1.18 – 1.18.2 | Server-side only | 2022-05-23 |
Questions
Does WorldgenTweaks need to be installed on clients?
Which loader does WorldgenTweaks support?
Will the changes affect worlds that already exist?
In the catalog
WorldgenTweaks 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.
More from ringlocker
Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/worldgentweaks
- Owner
- ringlocker
- Published
- 2025-08-25
- Updated on Modrinth
- 2025-12-21
- Facts verified
- 2026-10-15