Can someone recommend a clean, workable method for creating travelling mattes without having to roto every frame in a sequence by hand? Specifically, I've got access to a desk of After Effects, as well as Vegas. Both have nice tools for integrating elements which already have mattes, and I'm used to creating and rendering in layers, but have no experience reverse engineering a shot in this manner. Specifically I'm working on the opening three shots of ANH, and would like to isolate planet, moons, ships, and stars for various fixes. Thoughts?