I did infact have a skybox, but it turned out that it had a veeery small hole. huh. I just made a new one. The sky shader has also been resolved, thanks.
Two (last?) things: does anyone have an idea as to what is causing this behavior? Whenever I compile, the right wall of the red base has a triangular transparent section on it, that I cannot get rid of. It does not show up in the editor afaict. The "hole" block movement and projectiles however.
Also, why do the brushes I have defined as ladder entites become invisible when I compile? The ladder is functional, that is, I can move up it, but they are ne'er to be seen:
Thanks!
After I get that fixed, all that needs to be done is get some jumppads and teleporters going. Yeehaw!

I probably should have started with a map with less complicated brushwork, but so it goes.
