Frank Herbert uses the term "Selamlik" to describe the metal "tent" that the Emperor's uses as his base while dealing with the Arrakis affair.
"The selamlik (Turkish: selamlık) was the portion of a Ottoman palace or house reserved for men; as contrasted with the seraglio, which is reserved for women and forbidden to men.
Selamlik was also a portion of the household reserved for the guests (from the root word selam, "greeting"), similar to the andronites (courtyard of men) in Ancient Greece, where guests would be welcomed by the males of the household. The harem is the portion for the family."
The description from the novel:
"It wasn't the lighter that excited Stilgar's awe, Paul knew, but the construction for which the lighter was only the centerpost. A single metal hutment, many stories tall, reached out in a thousand-meter circle from the base of the lighter - a tent composed of interlocking metal leaves - the temporary lodging place for five legions of Sardaukar and His Imperial Majesty, the Padishah Empror Shaddam IV."
Other details include Gurney Halleck's observation that it has 9 levels (Instead of only 6 in the movie version).
Below you can see the original model being prepped for filming, how it appears in the movie - as seen by Paul through the oil lenses of his binoculars, then two of My work in progress renders, the first matching the same angle as the movie version but with the camera pulled further back to permit visibility of the entire structure and the second render revealing more of the environment, including two Spice Harvesters and the Baron Harkonnen's ship.
I am looking at rebuilding all the DUNE 3D models I have made to take advantage of the improvements in 3D since I first made them - in particular to take advantage of new more realistic rendering engines that should help to take the CG curse off of the images.
As a side note, the image with the sand-crawlers took 37 minutes 53 seconds to render out on My machine at home, while a render at work during My lunch break, took only 7 minutes 19 seconds!