Open Terrain Generator Mod 1.6.5, 1.12.2 (OTG), is an advanced world generator that allows you to create any kind of world without having to know Java. OTG is Terrain Control’s fork. It solves basic mod compatibility and instability issues. While maintaining compatibility to Terrain Control’s world packs, it adds many new features and fixes. The new features include biome dictionary support, an in-game UI that allows for simpler world creation, multiple worlds with the exact same preset, and mob inheritance. This improves compatibility with mob mob mods.
OTG gives you complete control over Minecraft’s terrain, objects, mobs, and structures.