Time to enlighten a newcomer.

[ceremony]

Originally posted by Buzzbomb:
1. This graphical glitch happens the first time I create a server then alt-tab out and start my client up and then go back to the server to set it to quick host and go back to the game. Im not alternating back and forth at all after I set up the game.

Alt-tabbing can cause this to happen. My advice: launch the server, hit Alt-Enter to put it in a window, and then launch the second game normally. Also put that in a window. Now you can switch between the two in the taskbar and not have the graphical corruption.