I've been using multi-pass rendering in Bryce for the last 4+ years. I don't do it with every scene but with more complex ones I do. I'll composite my various Bryce render passes in Photoshop (color, diffuse, specularity, reflection, shadows, volumetrics, object masks, and distance), and then create additional Photoshop layers to composite in (glow, glare, flares, more volumetrics, and dof) It truly helps in tweaking out your scene to your own detailed liking, after the rendering is done, and obviously since it is all done in layers, the effects are immediate. You cannot create in Bryce all the types of "passes" that exsist (in other programs), but you can do quite a bit of them. I have basically created materials to apply to the various objects in a scene to facilitate the creation of these passes, which all of it takes longer to do than programs that can do it automatically, yet...in the end I have SO much control in the tweaking of my picture in Photoshop, its worth it for scenes that could benefit from such post-manipulation. AgentSmith

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