Basically, the developers of the game allow you to go into your game files and edit all the shaders and different model files to whatever you want. It was done with the intention of allowing players to make the game suit themselves by adding textures or shaders (bit like the default woodstock experience)
However, with a bit of knowhow from guides online, you can delete the following items completely from the game removing them from view
- you can remove all cover which can't be shot through
- you can edit enemy colours to be whatever you like i.e make your enemy bright pink and visible
This basically sums up to hitting the deploy button and getting blasted from 300 meters.
I find it the worst while playing USMC because when you spawn on your squad leader, you get instantly killed