Add this to your ShooterInput.ini at the [ShooterGame.SGPlayerInputPawn] category, it disables post process AA, Bloom Fog and ColorGrading can be changed to 2 for warmer colors ingame (I prefer this setting, default is 0). Press F10 everytime you join on a server the first time you have started the game to activate the settings.

Bindings=(Name="F10",Command="PostProcessAAType 0 | BloomSize 0 | FogDensity 0 | ColorGrading 2",Control=False,Shift=False,Alt=False,bIgnoreCtrl=False,bIgnoreShift=False,bIgnoreAlt=False)