If you're using dynamic link, the transparency should transfer to AE. If you're rendering out a video from CH and dropping that into AE, which I'm guessing is what you're doing, make sure the video you're rendering out from CH has an alpha channel, and it should work fine. If that's not an option, you could drop a green still (or any color that doesn't appear in your artwork) and key that out in AE. ... View more