Can the lower part(1/5) of the skycube be made transparent?

[Whistler_XP]

My last question
Is It Possible to make the lower fog layer(bottom 1/5 of edge cube faces) and lower sky cube face transparent.

so you have greater visability when your descending and for better position orientation in a map,
I can pull out the sky and you can see the entire grid but the sky isint always black(the white sky is distracting so far all others look fine) black looks great and objects show up great high in the sky but on second play it gets laggy like a arena or if textures are incompatable itsis tremendously laggy

now i can make a domed or box sky in 3dmax nd make the lower or any part transparent or simply hide the side with a wall and a dome that lowers over the edge just like a hack big bike sx map where the arena is lowered down now beliieve me if we didnt use a sx plat or pull out the sky out I coulndnt have landed 22x with te bikes ability to glide and slow down the sooner you can see a landing the sooner you can move to land it

So a transparent portion (the bottom and lower sides from just above fog level) would be the best of both worlds.