One good way to preview, or quick-render a part of the scene Sir MWortman, is to set up the Animation to only render the duration you are looking to preview, then decrease the document size, maybe down to 300x200 or something small, and fast. Then turn your Rays down to 1, leave it on Regular AA, and go! Another thing I was hoping for in Bryce 5, which we didn't get, would be showing the "Hide" function in the Advanced Motion Lab, but alas... Maybe they'll figure it out in 6, so we can fade things from there? (shrugs)