How I solved the Red flashing lights (dots) issue

[theo]

I have a radeon 6850 and had the flashing lights issue. It struck me as odd that I could run the game with max antialiasing since my card is old and midrange. I also couldn't see much improvement and it was like aa wasn't working right. I thought that maybe fiddling with the 3d settings of the ati driver panel(AMD Catalyst Control Center) would help, so I put all the driver settings to max (I left aa mode, aa samples, anisotropic level and mode to the default 'Use application settings', no need to change those) and that fixed everything. Of course now I cannot run the game with max antialiasing, there is a big performance hit, but the flashing lights issue is gone. By the way that was the first time I saw how the game really looks in max settings. All the water reflections are perfect and everything looks amazing.. Changing back to the default driver 3d settings brings back the problem. I have the latest driver.

[theo]

I finally found that the setting that fixes the problem with the flashing lights is setting Anti-Aliasing Method to Supersampling in the 3d settings of the AMD Catalyst Control Center (radeon driver panel). I don't know why that is exactly since I set AA to MSAA X2 (multisamping) in the game but it works.