adywan said:

Now you can clearly see in the bottom one that the sun is behind the clouds and to the left. Now the next shot below follows directly from this one (and the bottom one precedes the last shot above).

Wow, the sun has magically moved 180 degrees. Now they fly straight into the city and the sun is once again more behind them and not in front like the last 2 shots

Actually, the sun moves TWICE - if you look at the 3rd image (of the Cloud Car outside the Falcon cockpit), the sun is behind the Cloud Car, putting the sun on the right side of Cloud City. In the 6th shot, the sun is on the left side of Cloud City, and then in the SE CGI shot, it is in front of Cloud City. WHEW! That sun is a movin'!