And synergy, I'm not trying to flog Truespace. "Real time rendering" is a very new collection of technologies - that is only appearing in a few products at the moment. Its just that Truespace is coming out with a new version as we speak, and it happens to include real-time rendering at a great price. In theory, anything that 3d app has to offer (for example, Truespace has had real-world physics simulation for 5 or 6 years now) is available once you have a real-time rendering capability. "The speed and fluidity of motion" is the most impressive thing, I think, and it certainly will help set-builders. But, you probably don't have to go to an enterprise-level game engine to get it. That's the only point I was trying to make.