SoilMachine-style layered erosion

1024x1024 layered terrain, SoilMachine-style water particles, weighted unsorted cascade, flood, and seep. Everything else kept simple.

Slice row

Top view: downsampled preview of the full 1024x1024 world. Ground brightens with height; surface water tints blue.

Vertical slice through the selected world row. Colors are layer types; blue shows pooled surface water.