vaderios said:
There is a missing window.

-Angel

What I don't understand is why the windows stop at that point at all.

Most of the buildings in Cloud City seem to be curved or round so if windows are justified on most of the wall in view, surely it should go all the way around (stopping at structural intersections and the like rather than where the camera was placed).

What made Star Wars interesting was the feeling of realistically lived in and live-inable fantasy realm (droids that had dings in them like well used vacuum cleaners etc). When Vader is first introduced he is framed like he is just there and not posing for an oil painting and it feels more true somehow.

I like the idea of adding the windows (it makes sense after all) but there should be a feeling that the buildings were designed to work and live in rather than just look better in a particular frame.