[Frambosie]

did you use caulk on the map? If you didnt, or even if you did, the engine is rendering the ENTIRE map, enve the parts you cant see..this combined with the general lag from the net can cause low FPS. And if you have those fans in the map (never played so i dunno) thats also gonna drop FPS. So, that could be the issue, but i never played the map..so i dunno...just shooting some ideas out.