I have a weird visual glitch. The game was normal for an hour and then all the flying bullet effects of the soldiers shooting at me(in singleplayer) are gone and replaced by blue ray-like artifacts of the bullet trajectories. This make the game almost umplayable as when i'm being shot from multiple directions, I'm surrounded by those blue lines. I've tried changing the detail level resolution, re-installed the game. I have a quad-core Win7 64. video card is Nvidia GTX 470 driver version 266.58
Anyone has seen that ?

Thanks