marvlin: whether there is a point that Poser5 cannot utilize anymore ram (is there an upper limit) and what the best chipset available for poser would be. Windows will give not more than 2GB RAM to a single application (I think with the exception of Windows Advanced Server). Windows XP itself and the current x86 chipsets do not handle more than 4GB RAM, unless you buy one of those new and expensive 64bit computers. Even in this case, being a 32 bit app, Poser will not get more than 2GB RAM. timoteo1 OOOPSIE! Nevermind, you're using the Mac version, eh? APPLES and ORANGES. The 15 Dons were rendered on my Mac, but the Tron animation was rendered on my Windows computer. At that time, there was no Mac version of Poser 5. As for rendering intensive scenes, do what the big studios do: render in layers. When you have a dancing figure in front of a static background, render the background separate from the figure as a still image and put them together in an image editor or a compositing program. This has the advantage that in case you make some tweaks to the figure, you don't have to re-render the background.