Better Vanilla Terrain

Name: Better Vanilla Terrain
Author: wonderful_Ai_Chen

Better Vanilla Terrain changes the default Overworld with a lightly modified datapack, smoothing the surface and adjusting rivers and biome edges.

FabricForgeNeoForgeQuiltServer required, client optionalAll rights reserved1.20 – 1.21.10

What it does

The mod is a lightly modified version of Minecraft's own datapack-based terrain, so new generation runs through the standard world generation system rather than a separate engine. The changes target the surface, which is made smoother, and the way biomes overdraw into one another, which gives smoother transitions between them. Rivers receive a minor adjustment to their course.

Only the server must run the datapack for the terrain to change, while a player may leave it out and still join. Better Underground Caves is an optional dependency that adds to the underground, so a world can pair the two. Files target 1.20 – 1.21.10 and are published for Fabric, Forge, NeoForge and Quilt, with the 1.21.10 build as the latest, released under All rights reserved and not open source.

Key features

Smoother surface
Terrain height transitions are softened, so hills and plains blend into one another with fewer abrupt steps.
Biome overdrawing
Biomes overdraw into neighboring areas more smoothly, reducing hard lines where one biome ends and the next begins.
River adjustment
Rivers receive a minor change to their paths, keeping the vanilla feel while altering how they wind across the land.
Datapack delivery
The changes are shipped as a datapack based on vanilla terrain, so they apply on top of the standard generator.

Gallery

Compatibility

Latest build for each game version and loader.

No stable releases

Every published file is a beta or alpha build.

Version

1.21.100.3+mod0.3+mod0.3+mod0.3+mod

1.21.90.3+mod0.3+mod0.3+mod0.3+mod

ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Optional 1

Better Underground CavesOptimize the original cave terrain and add large underground cave terrain.

Optional

How it compares

Full comparison

Cascades is a Fabric, Forge, NeoForge and Quilt option for server-side terrain on 1.18.2 – 26.3, under a Creative Commons non-commercial license with no derivatives. Rexle's better Overworld is server-side too, built for Forge and NeoForge on 1.20.1 – 1.21.7 under the MIT License. Editable World Generation is a client and server Fabric option on 1.20.1 – 26.3 under All rights reserved, and is not open source.

Mod	Loaders	Game versions	Environment	Updated
Better Vanilla Terrain	Fabric, Forge, NeoForge and Quilt	1.20 – 1.21.10	Server required, client optional	2026-06-28
Cascades	Fabric, Forge, NeoForge and Quilt	1.18.2 – 26.3	Server required, client optional	2026-10-01
Rexle's better Overworld	Forge and NeoForge	1.20.1 – 1.21.7	Server required, client optional	2025-07-15
Editable World Generation	Fabric	1.20.1 – 26.3	Client and server	2026-09-28

Questions

Does Better Vanilla Terrain need to be on the client?

No. The environment is server required with the client optional, so players can join without installing it, though the server must run it for the terrain to change.

Which loaders does Better Vanilla Terrain support?

Files are published for Fabric, Forge, NeoForge and Quilt, and the latest build for each is 0.3+mod for 1.21.10, released on 2026-06-28 on the beta channel.

Is Better Underground Caves required?

No. It is an optional dependency, so Better Vanilla Terrain runs without it, and it adds underground content only when installed alongside.

In the catalog

Better Vanilla Terrain is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 15,569 mods support Minecraft 1.21.10.