#3 Erosion Filter

[Anonymous]

This feature is hard to find in free software. But it can be tested in Wilbur freeware:
http://www.ridgenet.net/~jslayton/software.html
It's a way to simulate erosion on existing maps, by specifying precipitations, I don't know whether it works with percolation algorythm or anything else, but I use it to add some detail to low res satellite maps for height field use.