Jedi Dark Knight said:right on the tick Shanerjedi, those where among the original ideas Lucas had, amomng the Death Star being Bespin instead of a moon-shapped station, Vader having a throne surrounded by fire, coruscant filled with piramids, wookies intead of ewoks (I would have gone with that one!), and the like.....the untold riches in the star wars that never was, hehe.
The Cloud City design was based on an Imperial prison design for ANH but the Death Star was always a metal moon.