I've been using SweetFX for a month or 2 now, as its SMAA injector is much better than the in game FXAA option. Normally I reserve this for single player games, as it uses .dll injection and can therefore be mistaken for cheating software. I haven't been too wary about this so far for KF2 due to the lack of a competitive mode, but that's about to change with the addition of VS Survival. I'll probably remove it just to be on the safe side, but what is TWI's stance on programs like this?