As the title predator had just won the rtv vote, map switches and I enter that command into console as I've done many times before with no problem. My entire screen and I mean absolutely everything turns into a black and purple checker board. Even the main screen when not connected to server is a checker board. Cannot see "find server, create server, quit" but I can hear the clicking as my mouse hovers over. I can connect to the server through console and hear everybody and everything. I have restarted css couple times no changes. I have tried going into the server and doing "mat_colorcorrection 0" blindly and nothing happened. Need desperate help from those who have encountered this problem before.