Came across this accidentally while Googling for something else...
"Advanced Displacement Mapping with Leveller" by ElDiablo on the Twisted D.I.R.T. site.
http://www.twisteddirt.com/TutorialStuff/leveller_01.html
A few notes:
- The author mentions that the Dig/Raise tools don't work in world units. This would be a bug if true, so I'm investigating that.
- He mentions a default Undo level of 99 steps. Leveller actually uses a memory-fit scheme, so it's whatever number of steps would fit inside the memory you allocate. For simple brush edits, far more than 99 would fit.
- The Ramp tool doesn't recognize the Shift key to help constrain the angle to multiples of 45 degrees. This will most likely be addressed in 2.6.
Enjoy, Ray