When I compile my map and run it in HL2, the skybox looks completely fine. Nothing wrong. But when I take the .bsp and put it in Gmod, the skybox seems to go past into the void, and I get that weird camera-trail effect where the last frame stays.
Edit: I think the problem was my skybox textures not entirely wrapping around the map, but I haven’t tested it yet in Gmod. Is this the case?
Edit: Nope, no it wasn’t that.