Well on my pc it can take very, very long time to do the parking lot scene. No slight on your ability to code because I think you've done an excellent job. Even Quark allowed mappers to select just a portion to render. I was thinking perhaps an overlapping bounding box you can move around and it only renders whats inside.
Whatever you do, it'll be a great help to people on machines less than 1GHZ. I think that it will be a great help to anyone actually - especially when levels start getting big and useful!
Whatever you do, it'll be a great help to people on machines less than 1GHZ. I think that it will be a great help to anyone actually - especially when levels start getting big and useful!