@rumblesushi - I agree on the points about pb filters for the most part, I think a serious look at BSPs might see a speed improvement for large models/areas and I think you should seriously look at it to allow your faces to be divided, this prevents the overlapping of faces that can create graphical glitches, would help with face culling etc and lod stuff might be good to look at if you want to get even more speed!

It would be nice to see where this goes! Keep it up!

RipX