I've been having trouble with a feature of my map. I want to create an area which can be moved through (by players, bullets, projectiles ect) but not seen through. I've added it to my map but it doesn't obstruct sentry gun vision. Players would be dying to a sentry they cannot see and when I start play testing the map this will be very exploitable if not fixed. Is there a way to create a brush that sentry guns will consider solid, but not anything else? Thank you in advance for your help.