This is a bit off topic in a way by this shocked me to lavish amazing looking set’s that were not in the film.

http://www.miljenkrekakljakovic.com/dune.php

The mind boggles on how good these look and not to commit it to film is insane, I can’t get me head around this but obviously there are scenes set in these areas.

It could be interesting to Replace the emperors palace with the matte painting?

http://www.duneinfo.com/Content/images/arrakis/ron-miller/dune27.jpg

But I am not sure that really looks like reflects the interior and the lavishness of the emperors palace and it would seem ideas moved on quite a bit from the concept art. But like I said note the different design for the Landing Ship also. I would say it is Geidei Prime if you put the Matte Painting in the Background replacing the emperors model palace. I have a feeling this would have been the Sandaukar troops Landing on Geidi Prime.

This does look like perhaps what the Palace was meant to look like though.

Tried to improve make it less CG looking.

I think Caladan looks Good and Arakkis and Geidei Prime but the Emperor’s Palace looks poor.

One More Correction Change Caladan to Blue like it should be