AI can imitate the look - the boil between frames, the clay texture, the handmade wobble. What it cannot do is produce the thing whose value is that a person made it.
That distinction matters more now, not less. Generative video made polish cheap, and when everything is polished, polish stops being a differentiator and becomes wallpaper. The scarce signal is evidence of human effort: fingerprints in the clay, a shadow that shifts because someone's hand was in the shot, a set that took a week to build. Stop motion is arguably the most human-proof format there is, and choosing it is a deliberate costly signal - which is precisely why faking it with AI defeats the purpose. We explore the wider tension in Motion, AI and Real People.