goto this address in explorer
open engine.ini with a text editor
delete all existing and place this
save the file and right click it and click properties and tick the box that says READ ONLY and hit OK
the MSAA can be set to 2,4 or 8 but 2 is best without raping the GPU
Post AA you can mess around with but these settings are great for me.
Gamma default is 2 and 3 is quite bright