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William Wythers' Expanded Ecosphere

by Cristelknight

Adding nearly 200 new biomes and overhauling every vanilla biome, William Wythers' Expanded Ecosphere is a realistic world generation mod by Cristelknight.

FabricForgeNeoForgeQuiltServer required, client optionalCreative Commons Attribution No Derivatives 4.01.18.2 – 1.21.3

What it does

The mod adds new biomes built on the earlier WWOO and a separate WWOO project that focuses on reworking the vanilla biomes. Its biome set includes ancient forests, badlands variants, savannas, caves and many coastal and highland types, some of them taken from real-world regions.

Cristelknight marks the WWOO part as having good compatibility with other world generation mods, while the Expanded Ecosphere biomes are noted as less compatible. Large biomes are switched on through the forceLargeBiomes option in the WWOO config, since the author advises against the vanilla world presets. The overworld is not piglin safe by default; a datapack changes this so Hoglins do not mutate into Zoglins.

The server must run the mod, while players may leave it out, so the mod works when only the server has it. Installation needs Cristel Lib on every loader and Fabric API on Fabric. Cloth Config API is optional and enables a config menu. Files are published for Fabric, Forge, NeoForge and Quilt, with builds covering 1.18.2 – 1.21.3 and the latest file for 1.21.1.

Key features

  1. Nearly 200 new biomes

    The mod adds a large set of new biomes, including ancient forests, autumnal regions and deep underground zones.

  2. Overhauled vanilla biomes

    Existing vanilla biomes are reworked, so the familiar overworld terrain changes as well as the added regions.

  3. Large biome option

    A forceLargeBiomes setting in the WWOO config turns on larger biomes without relying on world presets.

  4. Optional config menu

    With Cloth Config API installed, the mod's settings can be changed in a menu instead of editing files by hand.

Compatibility

Latest build for each game version and loader.

1.21.x3 of 3 versions with builds
1.21.33.4.3Not available3.4.3Not available
1.21.1fabric-1.21.1-3.4.7Not availableneoforge-1.21.1-3.4.7Not available
1.213.4.1.1Not available3.4.1.1Not available
1.20.x4 of 4 versions with builds
1.20.43.3.1Not availableNot availableNot available
1.20.23.3.03.3.0Not availableNot available
1.20.13.2.43.2.43.2.43.2.4
1.203.2.03.2.0Not available3.2.0
1.19.x2 of 2 versions with builds
1.19.43.1.133.1.13Not availableNot available
1.19.23.1.9.13.1.9Not availableNot available
1.18.x1 of 1 version with builds
1.18.22.6.42.6.4Not available2.6.4
ReleaseBetaAlphaNot available

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

Requirements

Dependencies declared by the latest file for each loader.

Required 2

Cristel LibA Library mod for easy structure config and runtime datapacks.
Required
Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Required by 1 mod

Treeplacer - WWEE1.20.1

How it compares

Full comparison

Epic Structures: Witch Huts is a structure mod for 1.19 – 26.3, licensed as All rights reserved and not open source. Dry Deserts is open source under the MIT License, covers 1.19 – 1.21.8, and shares the server-required, client-optional setup. Expanded World is published under the CC0 1.0 Universal license for 1.19.4 – 1.21.4 and is not open source.

ModLoadersGame versionsEnvironmentUpdated
William Wythers' Expanded EcosphereFabric, Forge, NeoForge and Quilt1.18.2 – 1.21.3Server required, client optional2026-07-04
Epic Structures: Witch HutsFabric, Forge, NeoForge and Quilt1.19 – 26.3Server required, client optional2026-09-26
Dry DesertsFabric, Forge, NeoForge and Quilt1.19 – 1.21.8Server required, client optional2025-08-14
Expanded WorldFabric, Forge, NeoForge and Quilt1.19.4 – 1.21.4Server required, client optional2024-12-30

Questions

Does William Wythers' Expanded Ecosphere need Cristel Lib?

Yes. Cristel Lib is a required dependency on every loader, and Fabric API is also required on Fabric.

Do players need to install the mod?

Not necessarily. The server must run it, while players may leave it out.

Why is the overworld not piglin safe?

The author notes that Hoglins can spawn in the overworld and would mutate into Zoglins, so a datapack is needed to make it piglin safe.

In the catalog

William Wythers' Expanded Ecosphere is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 13,252 mods support Minecraft 1.21.3.

World generation mods8,515Fabric modsMods for 1.21.313,252

More from Cristelknight

All projects
Cristel Lib1.18.2 – 26.3[Let's Do] API1.19.2 – 1.20.2William Wythers' Overhauled Overworld1.20.1 – 26.3Simple Voice Chat Player Names1.21.7 – 26.2

Similar mods

Biomes O' Plenty1.7.10 – 26.3Cobblemon1.19.2 – 1.21.1Terralith1.18.2 – 26.3YUNG's Better Nether Fortresses1.18.2 – 26.1.2Dungeons and Taverns1.19 – 26.3Yeetus Experimentus1.18.2 – 26.3

What the author says

Expanded Ecosphere also changes Vanilla biomes. But those aren't listed here. Ancient Copper Beech Forest Ancient Emerald Beech Forest Ancient Golden Beech Forest Ancient Moss Forest Ancient Mossy Swamp Ancient Oak Swamp Ancient Taiga Andesite Crags Aspen Crags Autumnal Birch Forest Autumnal Crags Autumnal Flower…
Cristelknight, on the Modrinth page

Official listing

Owner
Cristelknight
Published
2022-12-03
Updated on Modrinth
2026-07-04
Facts verified
2026-10-15

Tags

AdventureWorld generationMobs
Open on ModrinthCompare