Well, Bryce is so much more than just lighting/atmosphere and the rendering engine..... it also has terrains/trees/primitives and materials etc.

I think the definition of a Bryce scene cannot be determined so easily, because I believe it would have something to do with the content of the scene as well. The determination is further difficult because everyone seems to have their own ideas what constitutes a Bryce scene.... or not for that matter.

Whatever happens, I agree with what ICM has determined.