Forget the number of figures. The number of figures is almost irrelevant. I tried it with Python scripts, you can render 100 low-res P4 figures or 16 V3 figures on an average XP or OS X computers, without running out of memory (the amount of physical RAM doesn't mean much in that regard anyway - ever since we have virtual RAM, an application doesn't even know how much physical RAM there is, the OS will always give it a 4GB address space to play in and handle the swapping). What you should be more concerned about is the number of textures, their size and your render settings. To quote the Poser 6 tutorial manual: "For example, a single 4000x4000pixel texture, without texture filtering, uses 64Mb of RAM (which is itself a good argument for reducing maximum texture size- see below) while with texture filtering on, that same texture takes 192Mb- more than twice the RAM for the same texture file. " Now, imagine one figure with color and bump textures for body and face plus a hair texture (five textures) - at that rate, the textures alone take 960MB RAM. Then you need some additional space for shadow maps, geometry, morphs, various internal structures the renderer is keeping and of course Poser itself, and it's easy to see where the 2GB program heap go to.