I also tried exporting a terrain at default resolution with a texture map, but the import into Bryce was decidedly unlovely. The mesh wasn't bad, but the texture map was Ughh! I'm no expert, so maybe there are workarounds that will give better results. If Carrara could give better, more usable results for exporting trees and terrains it would be a "must-have" for the users of even higher end apps. Good thing I'm happy with using Carrara as my main renderer/animation app and that it handles its own plant "primitives" so efficiently.