CoFH World 1.12.2/1.12 handles world generation. This stuff used to be in CoFH Core.

CoFH World

Requires:

Minecraft Forge

CoFH Core

How to install:

  1. Make sure you have already installed Minecraft Forge and CoFH Core.
  2. Locate the minecraft application folder.
    • On windows open Run from the start menu, type %appdata% and click Run.
    • On mac open finder, hold down ALT and click Go then Library in the top menu bar. Open the folder Application Support and look for Minecraft.
  3. Place the mod you have just downloaded (.jar file) into the Mods folder.
  4. When you launch Minecraft and click the mods button you should now see the mod is installed.

CoFH World 1.12.2/1.12 Download Links:

For Minecraft 1.12.2, 1.12.1, 1.12

Download from Server 1Download from Server 2