gl_outline 1 lets you see people through walls.

I've been playing with gl_outline 1 for more than a year and I certainly can't see anything through the walls

http://www.quakeworld.nu/forum/topic/5615/player-outlines#87079

it's possible only with gl_ztrick on. And btw only in certain places on certain maps.

Demo or screenshots where this happens?
I checked it briefly and couldn't notice that.

I played with it here: http://www.twitch.tv/ocoini/b/674118375?t=45m40s

The black lines flicker in and out of the wall as you move. The YA box is not the only location, its every wall and even a few thick ones as well. Aswell as standin on RA low, you can see people waiting on RA-High. etc etc.

Confirmed, it's hard to get onto the screenshot, but it's there - for testing purposes I used gl_outline_width 100.
720p