I agree that it is not impossible, but rather extremely impractical. It would probably require a decent modification to the engine to pull off, I can totally see it being done though. (by space engineer that is)
Personally I would recommend a fractal that is reflected and modulated to save performance, and somehow stretched or something to appear more cloudlike. I would ditch transparency for the most part unless it could be done without causing massive lag. I have poor experience with this kind of programming so all I can say is: without an engine update to allow for this, no modification can pull this off.
To reality, through nothing, from un-everything.