ReShade is an advanced, fully generic post-processing injector for games and video software. Imagine your favorite game with ambient occlusion, real depth of field effects, color correction and more ... ReShade exposes an automated and generic way to access both frame color and depth information (latter is automatically disabled during multiplayer to prevent exploitation) and all the tools to make it happen.
This preset may not suit your personal taste, i will be making more for games with different effects, etc.
I won't be going over how to install Reshade as it's fairly simple, once you have setup reshade drop the iw3mp folder into your reshade personal files directory
( ReShade\PersonalFiles\Presets ),
load up Mediator and select the premade preset.
This might help setting it up :p
I'd recommend turning your brightness in-game down :p