Complete and Total Terrain Overhaul (CATTO)
Mod that overhauls overworld terrain generation giving it a much larger scale and adding new biomes
Features
Realistic looking erosion
Giant mountains and oceans
Increased terrain height and depth: -320 to 2032
More stone layers
New biomes including:
- Marshes
- Grasslands
- Kelp Forests
- Brine Pools
Images
Required Mods
While not completely needed C2ME OpenCl Acceleration will make the terrain generate much faster - requires you to start minecraft with java 25
Recommended Mods
- Blooming Biosphere - It's cliff changes make the steep terrain look so much better
- Voxy or Distant Horizons - Makes the terrain visible without melting your computer
Compatibility
This mod includes patches for:
- C2ME OpenCl Acceleration
- Blooming Biosphere - Make sure to load the built in compatibility patch after the datapack
- Create Cosmonautics and Deep Seas
Incompatible with other terrain mods
Report any issues with other mods that the world height causes on github
Erosion
The erosion in this mod is made using Runevision's erosion filter you can find the original here: https://www.shadertoy.com/view/sf23W1
Also check out Runevision's youtube channel: https://www.youtube.com/@runevision and blog post about this technique: https://blog.runevision.com/2026/03/fast-and-gorgeous-erosion-filter.html
