Try these render settings.
I think most of your problem is the the material that Bryce will randomly pick for you or if you selected it yourself, then the way it is default mapping it to your terrain.
The middle image is “grassy peaks”. Looks sick like yours.
The bottom image is the same terrain lowered a bit with, a different included material applied and the sun move to the horizon to the right. A completely different ball game, huh? Bryce is amazing.
Take heart, I don’t think your Bryce is broken.