Sure, you have to work very hard at making the landscapes beleivable.... hard? give me 3 minutes and no more than a dozen mouse-clicks and I'll show you a very believable terrain. Add another 30 seconds for sky, mix well, wait for render, and I can have a believable landscape. When I start getting headaches and seeing double from whatever project I'm working on 'pushing the boundaries of this program', I love to just open a new file and whip out a landscape, seascape, moonscape, etc. Let's me know that all is still well in Bryce-world.