Well, I use imported models, and/or sections of them. My latest Bryce pic took a couple months of work and had to be split into 4 separate scene files, which were composited in the last Bryce file using mask renders. If I had tried to completely model everything in the scene from scratch in Bryce, the picture would not be finished for at least another year or TWO - and since booleans are so very memory hungry, the total file size would have been over 1Gb instead of only 260Mb. It's just not realistic for me to stick to the "ideal" of doing everything, absolutely everything, in Bryce. That said, I almost never use an imported object, or material,without making SOME changes in it - sometimes lots of changes. I frequently "kit-bash" (something I did constantly with plastic models as a kid) and use a part of this and a part of that and something created from scratch to get what I really want. Also, where feasible I try to build my own meshes in DesignCad - though I can't do the really complex-curved ones. I always try to keep postwork to an absolute minimum, preferably just to fix some render artifacts such as a bad seam in a Poser figure mesh. Even when it might be much easier to do an effect in Photoshop, I'll try first, and damned hard, to get it in Bryce. I'm always most pleased with a work if I can say "All Bryce, no postwork but signature." It doesn't HAVE to be that way, but that's the way I'd rather go. On the other hand, if it I can't get what I want in Bryce, then I have no qualms at all about fixing it in postwork.