For those familiar with the Pixel Bender feature that shipped with Flash 10 you know that it’s possible to author custom image filters or blend filters for static content. With Flex 4 and the newAnimateTransitionShader effect you can now leverage Pixel Bender filters as the “engine” behind animated custom state transitions.
The idea behind AnimateTransitionShader is that the SDK will take care of the gory details behind:
詳しくは、Just Supposeのサイトで
http://www.justsuppose.com/getting-fancy-with-flex-4/