Hello my fellow TG2 friends,
thank you very much for the compliments. The technique for making these displacements will probably soon be disclosed with an upcoming set of presets. I don't know when exactly, but Oshyan maybe able to be more specific.
For anyone wanting to try it in the meantime: this is simply an exponential function with a rotating exponent (a sinus), applied as a displacement to the steep walls. The terrain is called "hells bend", and I don't recall if I downloaded it from a public place or have been given permission to use it by somebody else.
I'm grateful for the comments at renderostiy so far. If you haven't left your comment and rating there yet, I'd appreciate if you would.
Regards,
Frank