At the request of Vaderios, here's a little analysis of Cloud City proportions.
The main establishing shots are those:


(THX to Vaderios for the HD screengrabs : )
The two shapes are similar but not quite the same.
The night one is broader (and from an almost straight camera angle).
The day one is narrower (and from a little lower camera angle).
I have a theory about that difference of width:
I think it's possible that the ILM guys, wanting to portray an enormous floating city, can have given a fish eye kind of effect to the mattes.
Such effect can shorten the broadest part of a wide horizontal shape, as the horizontal ends are further away from the camera, they are more affected by perspective than the vertical ends. And thus give the false impression the shape is narrower than it really is. (hope I'm making myself understandable?)
Cloud City saucer portion shape, for instance, is almost 4 times wider than it's height, so such an effect could occur…
So, my guess would be that the night matte was to portray a farther view of Cloud City while the day matte was designed to portray a closer view. But unfortunately, in the movie, the two views are used both in far range and close range, which messes things up a little. For instance, in the two screens above, the night matte is bigger but broader and the day matte smaller but narrower, it should be the opposite… (please tell me if this makes any sense to you guys :/ )
Another important shot is this one:

(This picture of the matte was missing a portion, so I completed it with screengrab from the movie)
In this close-up view the shape is even narrower. Again, as said above, perspective can explain the difference…
REM: I think the blueprint from "the essential guide to vehicles and vessels" book was drawn using this matte…
So, as the night matte seems to be the farther view of the city, we can assume perspective deformation is to a minimum. I choose to take that matte as a reference for my blueprint (however I used the close-up matte's better definition to draw the buildings portion, and a distant view (the Falcon arrival) for the end of the pylon):

Here's a comparison between the shots taking the height as reference, with my blueprint outlined in red:



About that:
vaderios said:
…
Also see some schematics about the two cloud cities

-Angel
vaderios said:
Ripplin said:
Why did they make Cloud City so different for the game? Just for aesthetics' sake?
This is an interesting pov Ripplin how a retro design can be modernized to our days.. meaning that the bulky one can be more slick and delicate. Plus the game version has the super structure be enormous compare the original one. just see how small are the buildings in the TFU one ;)
…
Actually Angel I think the picture you used for your mockups was actually an anamorphosed image to be used by the game engine which would wrap the picture around the 3D set…
As you can see the final Cloud City in the game is almost exactly the same as TESB:

About the superstructure being bigger than the movie version, I thing it may be just an impression, the POV si lower and closer here so the buildings portion is more affected by perspective and so smaller and less visible… So I think the slicker Cloud City was not intentional, but I agreed, it's kinda neat ;)
Well, here it is, tell me what you think…
(I'll talk about the size of that thing in another post, this one is big enough :p