Modern Beta Forge

Modern Beta Forge

Generate Beta, Alpha, Infdev, and Indev terrain for Minecraft 1.12.2

by
9.8K Downloads
forgeworldgen
Rent Server with this Mod

Screenshots

Beta
Alpha
Skylands
Infdev 20100415
Indev
Pocket Edition

About this Mod

Modern Beta Forge

A port of Modern Beta Fabric for Forge 1.12.2!

Enjoy all the toggle-able features of Minecraft 1.12.2 with the faithful re-implementation of the Beta, Alpha, Infdev, and Indev terrain generators. Originally done for a friend's server but now expanded on to match the original Fabric version in feature parity plus additional improvements/fixes. Please don't expect updates beyond bugfixes and minor improvements if I feel like it.

Features

  • Terrain generators:
    • Beta 1.7.3
    • Alpha 1.1.2_01
    • Infdev 20100611
    • Infdev 20100420
    • Infdev 20100415
    • Infdev 20100227
    • Indev 20100223
    • Classic 0.0.23a
    • Beta Skylands
    • Pocket Edition v0.6.0
    • Release (Vanilla) 1.12.2
    • The End
  • Biome generators:
    • Beta 1.7.3
    • Pocket Edition v0.6.0 (with Beta biomes)
    • Single/Fixed
    • Release (Vanilla) 1.12.2 with biome mod support
    • Biomes O' Plenty (when Biomes O' Plenty mod is installed)
  • Mix and match terrain and biome generators.
  • Classic Nether terrain generation.
  • Options to substitute Beta biomes with other vanilla or mod biomes for the Beta biome generator.
  • In-game world generation customization, based on the vanilla Customized world type.
  • Shareable and built-in world generation presets, like with the vanilla Customized world type.
  • Toggleable modern structures and decoration features.
  • Accurate Beta sky and Beta biome colors when playing in SP.
  • Adjustable cloud height for Modern Beta worlds, y108 by default.
  • Modified player spawns that place players on beaches like in classic versions.
  • In-game terrain/biome generation previewer before world creation.
  • Commands for inspecting and editing generator settings in-game.

Server Usage

The following should be done in the server.properties file:

  • Set the 'levelType' field to 'modernbeta', without the quotes.
  • Set generation options in the 'generator-settings' field. You can create the generator options string using the in-game GUI.

Mod Support

Additional support is provided for these mods:

  • Biomes O' Plenty
  • Thaumcraft
  • Buildcraft Energy
  • Dynamic Trees
  • Yung's Better Mineshafts
  • Millénaire - Download config files here

These mods are known to cause issues:

  • Galacticraft - Sky/Fog visual features will be disabled when this is installed.
  • Muon - This mod is incompatible.
  • Cave Generator - If you are experiencing tick/entity lag, please disable all biome replacement options to improve performance.

Add-ons

Modern Beta supports custom add-ons. Here are a few:

Preset Note

For accurate generation for non-Beta chunk sources, please select from the built-in presets first; simply changing the chunk source will not accordingly update the needed noise settings.

Why no Forge version for current versions of Minecraft?

I have no plans on working on current versions of Minecraft at the moment. Please take a look at Moderner Beta for an alternative!

Credits

Thanks to mrburgerUS, SuperCoder7979, Arenovas, Amb0s, PaulEvs, comp500, and the folks behind RetroMCP.

Available Versions

Modern Beta 1.12.2-1.9.5.0release
MC 1.12.2forge
May 18, 2026
Modern Beta 1.12.2-1.9.4.0release
MC 1.12.2forge
May 2, 2026
Modern Beta 1.12.2-1.9.3.1release
MC 1.12.2forge
April 10, 2026
Modern Beta 1.12.2-1.9.3.0release
MC 1.12.2forge
April 4, 2026
Modern Beta 1.12.2-1.9.2.3release
MC 1.12.2forge
March 31, 2026

How to Install Modern Beta Forge on Your Server

1

Order Server

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

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.12.2).

3

Install Mod

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

Compatibility

Mod Loaders

forge

Minecraft Versions

1.12.2

Server-side

Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

Modern Beta Forge 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 (1.12.2). You can switch loaders with one click in the panel.

Is Modern Beta Forge compatible with forge?

Modern Beta Forge officially supports forge for Minecraft 1.12.2. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Modern Beta Forge – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Modern Beta Forge 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 Modern Beta Forge with just one click on your server.

Recommended RAM
6 GBab €12/mo
Min. 4 GB | +1 GB pro 5 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.12.2