Before integrating caelum I was getting 150 FPS under Linux. After enabling it, I found all kind of weird effects like the scene looking too dark and having tree lights (and tree shadows for each object). Im not so concerned about the look, eventually I will solve that. But going from 140 to 30 FPS does scares me! My card is a GTS 450 with updated drivers. Any idea about what can be happening here?