That’s an interesting challenge…
I’m thinking you might be able to use a particle system to emit from one of your layers with 0 speed. Particular would do that. Not sure about particle world 2.
For me It would take a bit of experimentation to get there.
Just in case, if you have an evolution parameter using the posterizeTime expression will give you that stop motion look.
posterizeTime(4);
time*270
I did a quick test using fractal noise with Displacement Maps which could give you control over the angle but you’d have to make masks to create the right angle, which would be cumbersome.
Then I thought, in this day of AI, maybe there is a tool you could use? Try with EBsynth, draw the first frame and see if it can do a style transfer?