There is a Reshader widely used named, "SWEETFX"

[ILLEGAL]

This program enhances visuals in your Battlefield 4 game, but my question is it a hack??

 

[ILLEGAL]

Here from this YouTube site you can see for yourself.

 

[Delvious]

It varies from game to game. Some developers don't care and some do.

 

[Soulzz]

I would shy away from it.