Screenshot 1 of 7. A sparse jungle biome with tall trees and dense green undergrowth in William Wythers' Overhauled Overworld
What William Wythers' Overhauled Overworld works with.
| Platform | Java Edition |
|---|---|
| Loaders | Fabric, NeoForge, Quilt |
| Minecraft versions | 1.20.1, 1.20.6, 1.21.11, 26.1.2, 26.2, 26.3 |
| Environment | Client, Server |
William Wythers' Overhauled Overworld (WWOO) is a world generation mod for Minecraft Java Edition that overhauls every vanilla biome and splits each into sub-biomes, with softer transitions between them. Fabric, NeoForge and Quilt releases cover 1.20.1 to 26.3, and the newest release is 3.0.1 beta from 2026-09-16. It uses only vanilla blocks, so it is required on the server while players can join with vanilla clients.
What WWOO changes
The aim is a more realistic, atmospheric overworld that still feels like the landscapes you know, in the style of the old 1.16 and 1.17 WWOO. Biome transitions are reworked so one environment no longer jars against the next. The creators describe its compatibility with other world generation mods as good, but they list no tested pairings, so try it next to Biomes O' Plenty or similar in a fresh world first.
Since WWOO 2.6.0 three former add-ons are built in and can be switched on in the config: Navigable Rivers, Cliffs and Coves, and Towering Tepuis. A separate datapack edition exists for players who prefer not to use a mod.
Loaders, versions and dependencies
- Fabric: 1.20.1 to 26.3. The newest release needs Fabric API and Cristel Lib.
- NeoForge: 1.20.1 to 26.3. The newest release needs Cristel Lib only.
- Quilt: 1.20.1 to 26.3. The newest release needs Fabric API and Cristel Lib.
- Forge: stopped. Releases run 1.20.1 to 1.21, and the last one, 2.3.3, shipped in June 2024.
Dependencies differ between older releases, so check the file list for your exact Minecraft version. The newest releases are betas, which is the trade-off for running a current version. Pick your Minecraft version first, then download WWOO and each required library for that version and loader. Put all the .jar files in your mods folder, as the Java mod install steps describe.
Client and server setup
The server needs WWOO, and in single-player the mod goes in your own mods folder. The client side is optional. Friends with unmodded clients can join a server that runs it.
WWOO in action
William Wythers' Overhauled Overworld Mod Spotlight
Questions about William Wythers' Overhauled Overworld.
6 questions
How do I install William Wythers' Overhauled Overworld?
Download WWOO from Modrinth for your exact Minecraft version and loader, then add the dependencies listed for that file. The newest releases need Cristel Lib on Fabric, NeoForge and Quilt, and Fabric and Quilt also need Fabric API. Older releases differ. Put every .jar in your mods folder and launch with the matching loader profile.
Does William Wythers' Overhauled Overworld work on Forge?
Only on old versions. Forge releases stopped at 2.3.3 in June 2024 and cover 1.20.1 to 1.21. For newer Minecraft versions, use NeoForge, Fabric or Quilt, which all have releases up to 26.3.
Do players need WWOO installed to join my server?
No. The server needs the mod, but the client side is optional because WWOO uses only vanilla blocks. Friends can join a server that runs it with a vanilla client.
Is William Wythers' Overhauled Overworld compatible with Biomes O' Plenty or Terralith?
The creators call WWOO's compatibility with other world generation mods good, but they list no tested pairings, including these two. Test the combination in a fresh world. Never run it together with Expanded Ecosphere, which the creators say is not meant to be combined with it.
Which Minecraft versions does WWOO support?
Fabric, NeoForge and Quilt releases span 1.20.1 to 26.3, and the newest release is 3.0.1 beta. Forge stopped at 1.21. Pick the file that matches both your loader and your exact Minecraft version.
Is there a Bedrock version of WWOO?
No. WWOO is a Java Edition mod and Bedrock cannot load it. Java players who prefer not to use a mod loader can try the separate datapack edition that the creators publish.
