I think the intent refers to limitation of Poser like true reflections (prior to Poser 5). People have made images with mirrors or polished floors, but worked within Poser to acheive their reflections, rather than going to Bryce for their final render. I see plenty of renders in the Poser gallery with Bryce terrain and skies, or rendered elsewhere to get volumetric lights, etc. No problem. it's still art. No harm, no foul. I think someone once said there are two types of Poser users: the artists, and the engineers. It was liekly an engineer who made that stipulation }-)