Well we all know about it. There has been a big upshot of you deleting Rez file and seeing the results.
Well here is a list of some that we have found
Rf002--- On certain maps makes you go sideways without pressing default keys
RF005--- No bullet trail.
RF017 --- Turns Ghosts and people Gray so you can see them (needs to be deleted in game)
RF009-- make walls on train white
RF020 No Sky.