Attached Link: http://www.softimage.com/products/Xsi/v4/comparison/default.asp

*yp6: Weren't you the one that was returning Poser 6?* Haven't yet... Still have time to return it, and still curious about SR1 (when, if, and what.) Have to admit, another couple of (hi rez) characters that could use the face room would be great. *It sounds like you have XSI. I'm wondering what is stripped out in order to make it a lower price? Does it have cloth and hair? Does it have advanced lighting?* Downloaded the demo version, and will buy it once tax-return arrives. ;) There's a version comparison at the link. The biggest things "Foundation" leaves out from my perspective is rigid-body dynamics and hair. It still has soft-body dynamics, much superior rigging, cloth, "mental ray" rendering, IBL, particles, fluids, and quite a few other features that I don't have the ability to correctly describe. They do use different terms for similar functions in poser. I'd strongly suggest anyone interested download the trial. Free time is at a premium right now, so haven't had nearly as much time to "play" as I'd like...