AE Masks and Mattes

Before:



After:



This is two animated masks. The first is on the skyscraper itself to get rid of the sky around it in the image. The skyscraper is also moving in relation to the forward clip (granted it didn't come out all that great). The forward clip has a mask on the sky to allow the skyscraper visibility. Hair and trees were real problems when doing this. This is one time consuming process, but rather fun. I can see how this would work really well on a well planned shot (avoiding trees and hair type problems, etc).