Interestingly I tried it with "override any application setting" to force AA on, and I got some strange coloured lines round the edge of my screen. Don't get them when using the "enhance" option though.
I play with all settings on or high, apart from shadows, atmospherics, bloom and ambient occlusion all off. Not because they hog resources but because they hinder game play. They make parts of the map too dark and enemies can remain unseen because o…