I may be a little dumb, but I think photorealism is not a goal in itself. Manet and Monet, Van Gogh discovered it in their time when photography started to be practical. The feeling behind a picture needs more than soft shadows and motion blur, and I like Bryce vibrant colors and deep "feeling" (I'm afraid I'm not very clear here)... And even then I add a little more in Photoshop. By the way, a lot of siple trick used in "up-end" applications can straightily be used in Bryce but you simply need patience to set everything before rendering (there's an excellent book about lighting : Digital lighting and Rendering, by Jeremy BIRN, published by CampusPress, where you'll see the rendering engine is nothing comparing to the logic behind the lighting). :)