A couple of animated GIF stereograms: recent & old.  It does not appear I've made much progress.

The top animation was supposed to show the sphere spinning in opposite direction of the cage, but the high transparency with low texture ended up letting everything appear to turn in same direction.

The bottom animation is from five years ago.  Aside from having more hair, I was still using OS 9, and had a morphing application I liked, so I threw some morphing into the mix.