Sybixsus are you talking about a small scene like a church door and hall or a complete map with culling?
If it's a small scene with all that going on then I'd love to see a demo if possible because you must surely have few good tricks up yours sleeve there...and which slow card did you test it on at what fps?
If it's a small scene with all that going on then I'd love to see a demo if possible because you must surely have few good tricks up yours sleeve there...and which slow card did you test it on at what fps?