TheUndergrowth

To enhance the over-world without adding biomes, but instead reworking the already existing ones

1.3K Downloads

forgeneoforgedecorationequipmentworldgen

Rent Server with this Mod

Screenshots

About this Mod

title

(BEING REWRITTEN CURRENTLY)

PLEASE UNDERSTAND THE OLDER VERSIONS OF UNDERGROWTH PRE 2.0 WILL NOT BE MAINTAINED. THIS MODPAGE WILL BE OVERHAULED POST 2.0

This message will be here until the mod is properly updated to 2.0 :D

2026 Updates:

This version of the undergrowth project has been discontinued due to being made in mcreator. The mod itself will be continued down the road after I gain some more skills within texturing, and development in intellij.

I will be releasing a vanillia version of the worldgen changes i have made as well :3 I will note the later versions of this mod will be developed on 1.21.11+

mainly due to the fact of me learning development for those versions.

2026 May 15th Update:

Development is now rebegining with a clear goal of only adding small features to the overworld + new blocks

Available Versions

TheUndergrowth 1.4release

MC 1.21.1neoforge

July 14, 2025

TheUndergrowth 1.3release

MC 1.21.1neoforge

June 24, 2025

TheUndergrowth 1.2release

MC 1.20.1forge

March 21, 2025

How to Install TheUndergrowth on Your Server

Order Server

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

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.1).

Install Mod

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

Compatibility

Mod Loaders

forgeneoforge

Minecraft Versions

1.21.1, 1.20.1

Server-side

✓ Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

TheUndergrowth server crashes on startup – what to do?

Most common cause: wrong forge 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 (1.21.1). You can switch loaders with one click in the panel.

Is TheUndergrowth compatible with forge and neoforge?

TheUndergrowth officially supports forge, neoforge for Minecraft 1.21.1, 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with TheUndergrowth – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if TheUndergrowth 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.