How important is a map's Skybox?

[wind]

I dont think it should be server wide, would it be possible to make it client side? because most maps are built with a 2d skybox not a 3d so the actual effects of changing the skybox wouldnt be too much of a boost maybe like 5 - 10 fps, most skybox's are just flat images that dont move at all so i mean its literally the difference of a flat color jpeg vs a 2 tone to like 6 tone jpeg. I mean maps can be made with no skybox at all, i guess the best increase would be going on maps that have decals in a seprate skybox that renders around the 2d skybox, but again those can just be deleted off the map, i dont think the color will make much of a difference.

edit: If it is something you can change in the f1 menu then yeah itll help, but set it to either a gray or a blue color not adjustable cause adjustable could be abused. other than that ignore me if it is something f1 menu only