Star Wars Episode 3: Revenge Of The Sith Easter Egg - Manhattan Background Switch

Okay, in the FIRST scene where Chancelor Palpatine is talking to Anakin, it is daytime. In the background you can clearly see the background change several times from the rounded gray/white/metal buildings to that of downtown Manhattan! You can tell because the buildings turn square and and some of them turn into brick or steel like we have today. You can really tell that it was downtown Manhattan, because one of the tallest buildings had been changed into the Empire State Building! I'm not sure why this is really relevant to George Lucas, but it is denfinitely in there.