The Paintball mod allows you to more easily see damage that has been done to you or to someone else. there are three colors to look for.
Red. this color shows up when a highly damaging shot has been done (ie big guns). http://i1183.photobucket.com/albums/x468/Mind_knive/shot_014-1.jpg
Blue. this color means average penetrating damage. http://i1183.photobucket.com/albums/x468/Mind_knive/shot_012-1.jpg
Black. this color is a ricochet. http://i1183.photobucket.com/albums/x468/Mind_knive/shot_013.jpg
with small auto guns you will also see green but they are very small and hard to see.
this mod is very easy to install just put the particles folder in your W.O.T./res_mod/0.7.3 folder.