https://www.cnet.com/news/making-missing-link-the-laika-movie-of-100000-faces/

A Sir Lionel Frost puppet from Missing Link, minus his face.

McLean is demonstrating one of the ways Laika has worked to make its puppets more lifelike than ever for its latest movie, epic adventure Missing Link. And it starts with replacing the puppets' faces, sometimes up to 24 times for one second of film.