Simulating erosion to try make procedural terrains look a little more natural. See my video on this project here: https://www.youtube.com/watch?v=eaXk97ujbPQ
Before: After 70k iterations of erosion:
Resources: https://www.firespark.de/resources/downloads/implementation%20of%20a%20methode%20for%20hydraulic%20erosion.pdf http://ranmantaru.com/blog/2011/10/08/water-erosion-on-heightmap-terrain/