CurseForge · Minecraft mod
Modern Beta Forge
Generate Beta, Alpha, Infdev, and Indev terrain for Minecraft 1.12.2
Quick answer
Which Modern Beta Forge release matches 1.12.2?
Modern Beta Forge Modern Beta 1.12.2-1.9.6.0 targets 1.12.2 with Forge. The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server. All 1 required mods have matching files.
Where it goes
Is Modern Beta Forge required on the client, server, or both?
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
The source does not explicitly classify this release as client-only or server-only.
What else does Modern Beta Forge Modern Beta 1.12.2-1.9.6.0 need?
Modern Beta 1.12.2-1.9.6.0 on 1.12.2. Every mod below is checked against that same setup.
Install MixinBooter first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Modern Beta Forge without breaking your instance.
Built for Modern Beta Forge Modern Beta 1.12.2-1.9.6.0 on 1.12.2. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Modern Beta 1.12.2-1.9.6.0. It targets 1.12.2 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install MixinBooter first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside Modern Beta 1.12.2-1.9.6.0. It opens that exact file at the source.
About this project
What does Modern Beta Forge add?

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.
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
- Buildcraft Energy
- 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.
- CubicChunks - This mod is incompatible.
Add-ons
Modern Beta supports custom add-ons. Here are a few:
- Modern Beta Forge Release Plus - Adds biome generators from late Beta to early Release versions of Minecraft.
- Modern Beta Forge Islands - Adds island generation for several terrain generators.
- Modern Beta Forge Rivers - Adds river generation for several terrain generators.
- Modern Beta Forge Voronoi Climates - Adds biome generation with customizable biome maps and a visual editor.
I personally hate that 1.12.2 menus render at 30 fps, especially when adjusting Modern Beta world settings, here's another mod of mine to fix that:
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.
Project description from CurseForge.
Pick your setup
Modern Beta Forge by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.12.2
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Modern Beta Forge versions and loaders
Modern Beta 1.12.2-1.9.6.0
modernbetaforge-1.12.2-1.9.6.0.jar
2 Aug 2026
Modern Beta 1.12.2-1.9.5.1
modernbetaforge-1.12.2-1.9.5.1.jar
2 Jul 2026
Modern Beta 1.12.2-1.9.5.0
modernbetaforge-1.12.2-1.9.5.0.jar
18 May 2026
Modern Beta 1.12.2-1.9.4.0
modernbetaforge-1.12.2-1.9.4.0.jar
2 May 2026
Modern Beta 1.12.2-1.9.3.1
modernbetaforge-1.12.2-1.9.3.1.jar
10 Apr 2026
Modern Beta 1.12.2-1.9.3.0
modernbetaforge-1.12.2-1.9.3.0.jar
4 Apr 2026
Modern Beta 1.12.2-1.9.2.3
modernbetaforge-1.12.2-1.9.2.3.jar
31 Mar 2026
Modern Beta 1.12.2-1.9.2.2
modernbetaforge-1.12.2-1.9.2.2.jar
16 Mar 2026
Modern Beta 1.12.2-1.9.2.1
modernbetaforge-1.12.2-1.9.2.1.jar
24 Feb 2026
Modern Beta 1.12.2-1.9.2.0
modernbetaforge-1.12.2-1.9.2.0.jar
17 Feb 2026
Modern Beta 1.12.2-1.9.1.0
modernbetaforge-1.12.2-1.9.1.0.jar
29 Jan 2026
Modern Beta 1.12.2-1.9.0.0
modernbetaforge-1.12.2-1.9.0.0.jar
24 Nov 2025
Looking for an older file? The official CurseForge project page is in Resources.