I think he means: Such as when you are in a war game, it registers red on the screen where you got hit from. Left screen red if shot from left, infront of you would make the middle go red, hard to see strait, back is reddened at the bottom, and to get shot from the right would make the right side of screen red.
If I am not mistaken? :-)
This would be a cool setup. but perhaps it could be of the color that hit you, is the color you see as you die? Just turning everything that shade, still see game layout, just not the colors you would normally see.
perhaps make an arrow marker or something, that points to the spot you got shot from? simple rotation shouldn't be to hard. Bind it to the direction inwhich the paintball is being shot From, or bind it with the side of the body that got hit.
I like the idea, but not so sure it would work. It's possible, but not sure if plausible.