Hi Gdenby!
Thanks so much! I'm glad it was helpful. To make things easier to manage in Illustrator, I would add multiple gradient fills with the Appearance Palette so that I wouldn't have to use a lot of clipping masks.
The technique that I used for the face in AD was something I developed when drawing in Synfig. Both Synfig and AD have similar approaches and make for richer blends of gradients and easily masked shapes.
Here's a movie of me doing the Appearance Palette approach in Illustrator. I'll definitely think about making a video for AD. You can see the difference in the complexity of gradients you can build easily in AD as opposed to Illustrator.
https://vimeo.com/67880405