I always wondered if it would be possible to simulate real HDRI in Bryce (as in simulating that the lighting is actually comming from the HDR-image). So I downloaded a few HDR-images and started experimenting. I think this is very close to how HDRI works for real. In the next few images it's not about the mirrored balls but it's more about the grey ball wich has NO; - ambience - reflection - refraction It's just plain grey with only the diffuse channel used for color. The scene is set up without advanced options (no atmosphere, no blurry reflections, no blurry transmissions and no true ambience). The only thing that's changing all the time is the image I use for the HDRI sphere. Maybe someone has already posted this once but I don't remember then. If so then someone else should be credited for this :)