I don’t know how to solve the issue; however, I have two, possibly bad, ideas which maybe could be used or maybe could be used to spawn a good idea…
- What if you created a streaming level which contained the crisp cliffs which is streamed on top of the smooth heightmaps?
- What if you created a spline and used a mesh that had “rounded” edges such that you could spline form the well-defined cliffs where the characters are to travel within?