Thanks for the kind words Don!

I'm still kind of working on this heightmap here at Chez Paddles. First, I think the curves adjustment layer is better under the clouds layer. The clouds help to weaken the kind of regular smooth curvature they impose. Second, this heightmap honestly seems to look nicer without the curves altogether... Third, a couple more rounds of spread/clump/blur/contract would help oodles. Finally, as Redrobes has already said, a little erosion, even with bryce's erosion tools would make this thing pop nicely. Also, as a little addendum, mountains might tend to look better if they're not sitting on an infinite, perfectly flat, plain.

As time permits, and as I think of anything remotely useful, I'd be perfectly happy to provide tips on Bryce. I'm afraid rudimentary processes are the only kind I know.

Later, folks...