/bind f5 "^2[^3All-Maps-Tweek^2];r_filmTweakBrightness 0;r_filmusetweaks 1;r_filmTweakenable 1;r_filmtweakLighttint 0.8 0.8 1;r_filmTweakContrast 1.2;r_filmTweakDesaturation 0;r_filmTweakDarkTint 1.8 1.8 2;

::::::::steps:::::::
1. copy and paste the code in console
2. Press F5 to activate filmtweek
3. Press b52 to ON filmtweek
3. Enjoy..