Extreme Worldgen
by jeancrafteo
Extreme Worldgen is a data pack that reshapes the overworld and nether terrain, caves and trees of a world.
What it does
The data pack changes the default vanilla terrain generator: mountains get more realistic caves, many trees grow larger, and the nether receives terrain closer to the overworld, which makes it more difficult. Two new biomes, maple forest and samurai garden, are added. Server owners install it on the server, where it runs as a required component, and players may add the optional client side.
The mod is published for Fabric, Forge, NeoForge and Quilt for 1.21.4 and 1.21.5, and the latest file targets 1.21.5, released on 2025-05-03. It is released under All rights reserved and is not open source.
Key features
Realistic mountain caves
Mountains receive more realistic caves, and some of them are open at the ceiling.
Larger trees
Most trees in the default generator are replaced with bigger variants.
Overworld-like nether
The nether generates terrain closer to the overworld, with a harsher difficulty.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Basic Smooth WorldGen Datapack also changes terrain for Fabric, Forge, NeoForge and Quilt, on 1.20.1 – 1.21.8, under the Creative Commons Attribution Non Commercial No Derivatives 4.0 license. Overworldify is open source under the MIT License and covers 1.19 – 1.21.10 on the same four loaders.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Extreme Worldgen | Fabric, Forge, NeoForge and Quilt | 1.21.4 – 1.21.5 | Server required, client optional | 2025-05-03 |
| Basic Smooth WorldGen Datapack | Fabric, Forge, NeoForge and Quilt | 1.20.1 – 1.21.8 | Server required, client optional | 2025-09-29 |
| Overworldify | Fabric, Forge, NeoForge and Quilt | 1.19 – 1.21.10 | Server required, client optional | 2025-10-17 |
Questions
Does Extreme Worldgen need to be installed on the server?
In the catalog
Extreme Worldgen is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 15,307 mods support Minecraft 1.21.5.
More from jeancrafteo
Similar mods
What the author says
This datapack "Extreme worldgen" change the default vanilla minecraft generator terrain. Mountains are more realistics, caves are way more extreme, and nether is way more difficult, even with and open celling.
Official listing
- Modrinth page
- modrinth.com/mod/extreme-worldgen
- Owner
- jeancrafteo
- Published
- 2025-03-22
- Updated on Modrinth
- 2025-05-03
- Facts verified
- 2026-10-15