Eran: Thanks so much for tutorial. Very interesting, funny, and well done. A few questions:

1) I tried to duplicate this morphing with an Illustrator file with layers. I manually pre-composed the layers and enabled the time remapping, etc, in AE but the blending option wasn't available for the layer in the composition panel and it didn't work. I did get it to work with a Photoshop sequence, as you showed. Does this morphing work only if the source files are photoshop sequences?

2) If there is some blending that isn't quite as clean as wanted, can you manually clean it up? If yes, how?

3) I am focusing on making a face turn, say, from a straight ahead keyframe to a face/keyframe turned 45 degrees... It seems to work well, but would you recommend another process to handling the inbetweening?

Thanks so much!

Yes! you must use a movie file, or image sequence which has video qualities inside After Effects, that allow it to use Frame Blending option.
Thanks for highlighting this again :)

I used to think morphing was hard yet it can be as easy as this :) Thanks man this tutorial is definitely going to save my time :)