In this example, the Hydro Erosion tool has been used to paint rain erosion onto the surface of the hillside. This makes it appear that parts of the Landscape have eroded away over time as rain
has fallen. The tool settings can enable the amount of rain and areas that it affects to help define the look.
Use the following controls to Sculpt with Hydro Erosion for your Landscape heightmap:
Left Mouse Button
A noise filter is used to erode parts of the heightmap.