Thanks. I look forward to finding out.

I'm now not sure it was just your map. My computer continued to have issues after I exited Portal2, and later on it blue-screened. The fact that I was playing your map when the problem started may have just been a coincidence. I'll give it another try tonight.

I did notice a performance issue with only one part of the chamber myself. Paused for a moment when activating the hard light bridges each time. Wasnt sure if that was just a glitch in PeTI since i never had similar issues in the normal game with hard light bridges.

Ill try to tweak the lighting & see if that improves performance. Since its not that complex a chamber compared to some of the ones I have built and tested while building concepts for maps.

This chamber is so busy, it's making my machine stutter like crazy. Unplayable.