Yeah, make sure your sky isn't set to be volumetric, or at least reduce the settings for it drastically (done in the sky lab). That simple pic of that size shouldn't have taken that long at all. Or, perhaps it is your render settings, I've heard Bryce 5 has some computer-crippling high-end settings. I don't have Bryce 5 (I assume that is what you are using) BUT...I DO have an almost obsolete-slow-butt speed computer and I do much more complex scenes in way less time. The only time I took 24 hours to render was a 45Mb .br4 file with 200 objects in it.

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