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Modern Beta Forge

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

Forge
Loaders
Forge
Downloads on Modrinth
13.9K
Followers on Modrinth
23
versions
51
Updated
October 17, 2026Oct 17
Published
in 2024
Beta · swipe

At a glance

Runs on Forge
For Minecraft 1.12.2
Needed in the game and on the server
Latest version — 1.12.2-1.10.3.0 from October 17, 2026
Requires MixinBooter
License MIT — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.12.2
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. Optional in MP.
  • 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.
  • Support for extended height limits when using Depths Update or Cubic Chunks.

Server Usage

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

  • Set the 'levelType' field to 'modernbeta' (or 'modernbetacubic' if using Cubic Chunks), 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
  • Buildcraft Energy
  • Cubic Chunks - Supported for height extension.
  • Defiled Lands
  • Depths Update - Supported for height extension.
  • Dynamic Trees
  • Future MC
  • Millénaire - Download config files here
  • Oceanic Expanse
  • Thaumcraft
  • Yung's Better Mineshafts

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:

Other recommended mods:

  • Smooth Menus - Increases frame rate for in-game menus, including the customization GUIs.
  • Celeritas

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. The Minecraft Wiki was sourced to provide some descriptions in this mod.

FAQ

How to install Modern Beta Forge?

Install Forge for your Minecraft version, download Modern Beta Forge for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Modern Beta Forge support?

Modern Beta Forge has builds for Minecraft 1.12.2.

Is Modern Beta Forge needed on the server?

Needed in the game and on the server

License and source
MIT Licensefree to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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