A few things…first of all, I have a picture here, and I’m wondering how I can fix this, and stop people from seeing it.
Secondly, the flag models. I import them, give them the frames, etc, but the shader, or texture, or whatever it is is NEVER there. It’s still the orange thing.
I’ve become a much better mapper than ever before, and I think my first real, non-suck map will be released soon 
If you help me along with these problems, that is.
here’s the extra space thing:
is that the only solution there? is there an alternative?
You see, my environment ENDS where I’m standing but I guess because I’m not ‘covering up’ the rest of map you can see this.
There are some other options
use clip, a steep slope, or a combination of both to prevent people from reaching the edge of your world. If you maky the foliage really dense right where the clip is, that should keep people from feeling that there is an invisible wall there, though it could hurt their frame rates…
use a skybox (either a props_portalsky entity, or one made from images.) You should be able to find information about both of these for RTCW.
I think the key is to keep people away from the edge of your map. Look at radar by the chainlink fence to see some varied methods of keeping people from seeing the underside of a skybox. ReyalP mentioned clip brushes, which are useful. I think you should design the edge of the map so that the boundaries feel natural a la terrain sculpting or fences, etc.
Well, I’ll try, it’s just that, you see, my map is a purposefully un-realistic deathmatch. If I wanted to take a quick shortcut, even if my players could reach edge of world, is there some way to mask? In the end fi there isn’t I guess I’ll do a wall, but I’d prefer not to.
if you have terrain ANYWHERE int he map, along the edges just make a ridgeline.
If you have a factory or something, do a chain link fence, some sort of piles of gravel, etc.
If it’s completely unrealistic… well then… do anything… a wall, or a moat or whatever :).