Hi, Khai. Yeah, Lightscape engine is one of the best all around. Don't know how fast it is, but I know they were the first to come out with radiosity, and seem to keep right in with the newest developments in lighting. But I think what keeps Truespace out of the hands of pros is not only it's "cheap" price, which makes some guys skeptical, but also it's big, bright, colorful interface that can tend to be very distracting. Maybe they changed this in newer versions, but when I had it, the interface was a little "amateurish", and I think many guys who do serious modeling and modeling to precise scale got very distracted by it. I don't know how customizable it is either. Just like in Poser and Bryce, the big buttons and colorful displays just take away from workspace. I think that's where Daz is going to have Poser beat.