Copy and paste one of the Terrain Diffusion files into the mods folder based on the following:

| Build                     | Supports                    | Setup required       |
|---------------------------| --------------------------- | -------------------- |
| **Windows** (recommended) | Windows with any modern GPU | None                 |
| **CUDA**                  | NVIDIA GPUs                 | CUDA + cuDNN install |
| **CPU**                   | Everything else             | None                 |

For more info see https://github.com/xandergos/terrain-diffusion-mc/blob/master/README.md