I just recently got Mirror's Edge. I have all settings at highest and AA at x4. However, there are these lines in the distance and on my character as well as others that won't go away. They appear to be model lines or something?
After messing around a little with the settings i found that only 4xAA makes those black lines. 8xAA and up make my game run slow but 2x is ideal I suppose. Kind of upsetting that a card that seems to be really powerful cant handle more than 2xAA on this game but what is there to do about it? Oh well.