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William Wythers' Expanded EcosphereMinecraft mod for 1.21.3

A realistic Minecraft world gen mod that adds nearly 200 new biomes and overhauls all vanilla biomes.

server onlynewest supported 1.21.3AdventureMobsWorldgen
Latest version
fabric-1.21.1-3.4.7
Minecraft
1.18.2 to 1.21.3
Java
Java 21+
Loaders
Fabric, Quilt, NeoForge, Forge
Licence
CC-BY-ND-4.0
Downloads
1.1M
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host William Wythers' Expanded Ecosphere servers

One click and William Wythers' Expanded Ecosphere is installed with the right loader, on hardware built for it.

  • 1.21.3
  • Fabric
  • Quilt
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version William Wythers' Expanded Ecosphere declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.3Fabric, Quilt, NeoForge, Forge21+declared23 Oct 2024
1.21.1Forge, Quilt, NeoForge, Fabric21+declared8 Aug 2024
1.21Forge, Quilt, NeoForge, Fabric21+declared13 Jun 2024
1.20.4Forge, Quilt, NeoForge, Fabric17+declared7 Dec 2023
1.20.2Fabric, Forge, NeoForge, Quilt17+declared20 Sept 2023
1.20.1Fabric, Quilt, NeoForge, Forge17+declared12 Jun 2023
1.20Forge, Quilt, NeoForge, Fabric17+declared2 Jun 2023
1.19.4NeoForge, Quilt, Forge, Fabric17+declared14 Mar 2023
1.19.2Fabric, Quilt, NeoForge, Forge17+declared5 Aug 2022
1.18.2NeoForge, Forge, Fabric, Quilt17+declared28 Feb 2022

Download

From William Wythers' Expanded Ecosphere’s own host. Nothing is re-hosted here.

fabric-1.21.1-3.4.7release4 Jul 2026

expanded_ecosphere-fabric-3.4.7.jar · 1.7 MB · for 1.21.1

Download latest
15460d530796…
Older versions18
  • neoforge-1.21.1-3.4.74 Jul 20261.21.11.7 MB082878bc1739…Get
  • fabric-1.21.1-3.4.627 May 20261.21.11.7 MB422338e5391e…Get
  • neoforge-1.21.1-3.4.627 May 20261.21.11.7 MB6f5a601cd932…Get
  • 3.4.54 Dec 20251.21.11.7 MB9e0208d1fe95…Get
  • 3.4.417 Nov 20251.21.11.7 MBacf5c2b56d88…Get
  • 3.4.316 Nov 20241.21.31.7 MB55a72e217f88…Get
  • 3.4.1.116 Nov 20241.21, 1.21.11.7 MBec77b9405a6e…Get
  • 3.4.210 Nov 20241.21.31.7 MB2f680aba0e0b…Get
  • 3.4.121 Sept 20241.21, 1.21.11.7 MBd5eb7e71384a…Get
  • 3.4.024 Jul 20241.211.7 MBdc8aa3360e5b…Get
  • 3.2.43 Jan 20241.20.11.9 MB0a406459197e…Get
  • 3.3.129 Dec 20231.20.41.9 MB47307994f5df…Get
  • 3.3.07 Nov 20231.20.21.9 MB8c5393e6a52f…Get
  • 3.2.37 Nov 20231.20.11.9 MB758963d78b81…Get
  • 3.2.113 Sept 20231.20.11.9 MBe763af059ff2…Get
  • 3.2.029 Aug 20231.20, 1.20.11.6 MBa1c95db2e8d5…Get
  • 3.1.9.16 May 20231.19.21.9 MB1e207ee39586…Get
  • 3.1.96 May 20231.19.22.0 MBad62ced4dce7…Get

Frequently asked

Does William Wythers' Expanded Ecosphere work on Minecraft 1.21.3?

Yes. 1.21.3 is the newest Minecraft version William Wythers' Expanded Ecosphere declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does William Wythers' Expanded Ecosphere support?

Everything the author has declared, from 1.18.2 up to 1.21.3. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install William Wythers' Expanded Ecosphere on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does William Wythers' Expanded Ecosphere support?

Fabric, Quilt, NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for William Wythers' Expanded Ecosphere?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is William Wythers' Expanded Ecosphere under?

CC-BY-ND-4.0, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install William Wythers' Expanded Ecosphere?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download William Wythers' Expanded Ecosphere safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .