William Wythers' Overhauled Overworld

William Wythers' Overhauled Overworld

This mod overhauls all vanilla biomes, with different sub biomes!

by
1.7M Downloads
fabricforgeneoforgequiltworldgen
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Screenshots

Swamp
Sparse Jungle
Sunflower Plains
Banyan Trees
Navigable Rivers
Bulrush Swamps

About this Mod

Welcome to William Wythers' Overhauled Overworld for 1.20.1 and higher!

William Wythers' Overhauled Overworld

Introduction

This mod attempts to recreate the familiar landscapes you know and love in a way that creates a more realistic and atmospheric world.

WWOO/WWEE difference

We decided to split WWOO in two distinct mods:

  • Expanded Ecosphere: This mod includes new biomes and builds upon the old 1.19/1.20 WWOO (bad compatibility with other world-gen mods).
  • WWOO: This new project is focused on overhauling the vanilla biomes and is inspired by the style of the old 1.16/1.17 WWOO (good compatibility with other world-gen mods).

Use one or the other! Don't use both. Many features might be doubled and they are NOT intended to be combined.

Key Features

Overhauled Biomes

Every biome has been reworked to provide a more realistic and immersive environment. Say goodbye to the standard biomes and welcome an enhanced world filled with diverse landscapes and exciting adventures.

For an extensive showcase of the (sub)biomes, join our Discord and check out this channel (1.21.5+).

Biome Transitions

Discover the new transitions between biomes, that eliminate jarring shifts between environments, allowing for a more natural world flow. Check out this example picture in the Gallery.

Compatibility with Vanilla Clients

Worried about compatibility issues with your friends? Fear not! Overhauled Overworld exclusively uses vanilla blocks, ensuring that you can install this mod on your server, and your friends can join with their vanilla clients. This makes for a hassle-free and enjoyable multiplayer experience.

Enhance Your Experience

Since WWOO 2.6.0 these are included in the mod and can be enabled via the config!

  • Navigable Rivers: Improve your river experience with this travel-friendly add-on. Download Here

  • Cliffs and Coves: Improve your world with better coastlines using this add-on. Download Here

  • Towering Tepuis: Add a forbidding and mysterious area of adventure to your world. Download Here

If you prefer a datapack over a mod, click here to download the datapack version of WWOO.

Join Our Community

If you have any questions, suggestions, or just want to connect with fellow adventurers, we invite you to join our Discord Server. While there's no Wiki available yet, our friendly community is always ready to assist you on your journey through the Overhauled Overworld.

Available Versions

WWOO 2.6.7release
MC 1.21.1neoforge
May 28, 2026
WWOO 2.6.7release
MC 1.21.1fabric, quilt
May 28, 2026
WWOO 2.6.6release
MC 1.21.1neoforge
May 23, 2026
WWOO 2.6.6release
MC 1.21.1fabric, quilt
May 23, 2026
WWOO 2.6.5release
MC 1.21.1fabric
May 22, 2026

How to Install William Wythers' Overhauled Overworld on Your Server

1

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1.2).

3

Install Mod

Open the mod browser in the dashboard and search for "William Wythers' Overhauled Overworld". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricforgeneoforgequilt

Minecraft Versions

26.1.2, 1.21.11, 1.21.10 (+12 more)

Server-side

Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

William Wythers' Overhauled Overworld server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (26.1.2). You can switch loaders with one click in the panel.

Is William Wythers' Overhauled Overworld compatible with fabric and forge and neoforge and quilt?

William Wythers' Overhauled Overworld officially supports fabric, forge, neoforge, quilt for Minecraft 26.1.2, 1.21.11, 1.21.10. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with William Wythers' Overhauled Overworld – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if William Wythers' Overhauled Overworld consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install William Wythers' Overhauled Overworld with just one click on your server.

Recommended RAM
6 GBfrom €7.800000000000001/mo
Minimum 4 GB | per 5 players
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NVMe SSD Storage
DDoS Protection included

Details

License
Creative Commons Attribution Non Commercial No Derivatives 4.0 International
Server-side
Required

Supported Versions

26.1.21.21.111.21.101.21.81.21.71.21.61.21.51.21.41.21.11.21+5 more