Yeah, as I’ve said I’ve added those scripts to my map to make corpses disappear (in my case after 8 seconds, I find that long enough). I know the bug itself doesn’t have anything to do with the mirror - but the r_speeds make me suspect all the corpses are being reflected on it, even though r_showtris doesn’t show them being drawn on the mirror. When I look at the wall where the mirror is I don’t see any corpses, yet the r_speeds are indicating they are being drawn
About unblocking part of a tunnel after some enemies are dead, it’s possible. I’m not sure if target_kill works on solid entities but you could always have a script_mover with the clip texture over it that just goes away (moves to another position) when you kill the enemies… you can use an accum value to tell this script_mover that all the enemies you want to be dead are in fact dead.