This mod is perfect if you want to play a bit more realistic. If you came across some other mods like the no post processing without outlines, or the disabled outlines mod. this two mods share the same problem, they disable the color gradient filter, the hit screen effect and flashbangs, so i made my own mod and now the effects work jost fine. You may like this mod if you play l4d2 on realistic

*disabled outlines for everything

put it into mods folder