Dont know if this will hellp BasketBallBen but a consideration is to try a sky box with the tectures you want on it and Ventilators script to run it.
What this means is that you can have the illusion of wide open spaces kinda like a background environment.
Make a model box at default size in Med, texture all the sides with your texture choice, i.e. ground-bottom, sides-view, top-sky sorta thing, then build a normal sky box in med and have it twice as large as your area with a sky texture on it and replace the default sky script with Ventilators one;

code:

---

 // The following script controls the sky
sky cube
{
   type = <skycube2.mdl>;
  layer = 3;  scale_x = 55000;
  scale_y = 55000;
  scale_z = 55000;
  flags = scene,visible;
  material=mat_sky;
} 

---

This is a good work a round solution that needs some effort to make it happen.
Cheers..