I am actually asking for someone who is able to help, if you don't know then please don't bother posting.
So recently I've been interested in making some maps, or at least having ago at it. I downloaded Source SDK, Half Life SDK and Counter Strike : Global Offensive - SDK. The only one I could get open was the CSGO one, so I loaded it up and looked at a basic tutorial to get started, it told me to press F9 to save then test, so that's what I did; but when I did that, this came up :
I know it's a crappy texture and yes I have got CS:GO installed, I just don't know how to fix this, as I have googled it and nothing came up. Maybe I'm being a complete idiot, and it's fine to start raging at me, just please help.
Thanks