I placed lights and gravity/kill volumes in my forge level (on the map, impact)
Problem: The lights and volumes show up as physical volumes in custom/normal games. In reach they would be hidden.
It is probably something silly but I have looked around for an hour and can’t find a way to fix this. Help please? 
halp? shockingly, despite making great efforts I still have no solution to this tomfoolery. It’s the most basic/crappy problem ever someone must know what I’m doing wrong.
sorry to bump but I still have not resolved this. Any help, please?
As far as the gravity zones, you need to select the 5x5 Inv or 10x10 Inv. Those are the invisible ones that won’t show up in games, according to a video I saw.