Erosion, faked cheaply

Real erosion simulation moves material downhill. Mixing a blurred copy back into the height field is not that, but it softens valleys enough to read as older terrain.
Made-up landscapes rendered as maps: hillshade, contours and colour ramps.

Real erosion simulation moves material downhill. Mixing a blurred copy back into the height field is not that, but it softens valleys enough to read as older terrain.