Yeah i already read that , and i test them , the result the trace will hit in object only , i purchased ISP INTERACTIVE in marketplace and i found what i’m looking for , he made many blueprint one of these is eye switch , the idea of this , you have two object one is visible the second not invisible , if you play you will see first one , if turn player and the you back you will see second one in same area , i tried to edit his blueprint , but i’m little confuse