There are many addons that use (what I think is) stencils to show you a different portion of the world, such as the Tardis addon and many of the Portal Gun addons (with the portal entities).
My question is, how would I achieve the effect all these addons use? If I had a vector and an angle for a position that I’d like to be shown, how would I show it?
Or to be more specific (and make it even more complicated), I’d like to know if it would be possible to make the skybox of any map (probably using traces to find the bounds of the skybox or something as I assume there’s no straightforward way of doing this) show a place in the normal-sized world (maybe there’s a texture you could use?) Also, to avoid insane lag, would it be possible to make the skybox show it’s regular texture after one layer of the regular world (if that makes sense)?