Bryce has done good for me. Sure, you have to work very hard at making the landscapes beleivable, but to me that's what pushing the boundaries are for. Bryce comes with the lattice options in order to create other things besides landscapes, imports different formats so that you're not stuck with Bryce's primitives. It would be nice if Bryce 6 came with new tools such as vertex or spline modeling, but if it doesn't, no big deal; it's what one does with it is what counts :-)