[_PRIME_]

hey! i need the help of a expert i think. when ive compiled my map and im walking thru it at a certain point this yellow or should i say illuminuse green line springs up from nowhere and then dissapears. now this happens in the same place but not everytime. does any1 know what it is?. i think it came about because at 1 point i had this brush which didnt shgow up in the editor but was in game.i managed to delete it by drawing a brush around the area where it was but im now left with this. plz if any1 could help id really appreciate and it would save my map from the bin.