There are a lot of tricks to speed things up, such as keeping the document in "Shaded" mode (instead of full, "Texture Shaded"). Switching between the Rooms may be a problem with slower machines as Poser has to do a lot of calculating (and rearraging of the user-interface). But, when you go to render the scene, remember that the slower the computer, the longer it will take. By comparison, a scene (1 Vicky figure with clothing with trans maps, 3 lights, and shadows turned on) on my 1.8Ghz laptop: Using P4, it took about 30-40 seconds to render. (Shadow map for light one, light two, light three, rendering... done!) Using P5, I cancelled the render after 5 minutes of "Calculating Shadow Map" messages. I suppose it was using the default FireFly renderer, but I didn't think to check it.