
Terrains and Landscapes in Un real Engine 441
to water runn ing down from higher elevations to lower elevations. To a llow for
more natural appearances, the tool also provides a noise setting applied to initial
rainfall location.
TABLE 7.12: Hydro-Erosion Tool
•
Options
Tool Strength: Contro ls the amount of smoothing this tool applies
to the He ightmap with each stroke.
Rain Amount: This is the amount of rain applied to the surface.
Larger values result in more eros ion.
Sediment Cap: This is the amoun t of sedime n ts that the washing
rain can carry down the hills. Larger values result in more ero-
sion.
Iterations: The number of iterations performed.