adywan said:
this is something that has always bugged me about bespin. does it have 1 or 2 suns? look at the scene where the falcon first approaches cloud city. first the sun is behind/ to the left of them then its in front of them but the 2 positions of the sun are consistent so maybe there is 2 suns after all. in the end it all just ends up that i think the clouds look better lighter in the foreground. i did try it with the clouds darker but it just didn't look right at all and didn't have the effect that i was after and the background clouds were perfect especially when, towards the end of the shot, you see the sun poking out from behind the city

According th Star Wars Wiki it has one sun Ady, take that for what it is worth to you.