I am about finished the first alpha version of my map, and just recently copy and rotated the map to create the red side. While testing I noticed the lighting was different, it wasn't bouncing and it was all direct lighting. This is a sign of a map leak so I checked the compile and sure enough I was right. Code: ProcessBlock_Thread: 0...1...2...3...4...5...6...7...8...9...10 (0) **** leaked **** Entity trigger_multiple (-248.00 2944.00 -3824.00) leaked! I loaded the pointfile and went to where the leak was, however the red leak line was going straight through my completely sealed off skybox. So I went to the brush trigger entity causing the problem, made sure none of it was sticking outside the map, but no issues were found. I tried deleting the trigger entirely and making a brand new one and still get the same leak. One thing to mention, is that this trigger causing the leak is a part of a gimmick in my map where if an enemy goes through the vent flank route an alarm will go off. Also another thing is that it was special copied from an identical trigger on the blu side (which has no leak). I looked up other possible reasons my map could be leaking due to this trigger. I made sure the entity origin was on the map. Made sure none of my skyboxes had any translucent sides. I don't even have any area portals yet. Basically I looked at anything that could have caused the leak but I was unable to find anything at all. Does anyone else understand the issue here and how to fix it? I'm only a little experienced in map making, so I must just be missing something.