I tried different things (here) based on Ashley response:
Put the sprite used for 3D shape's faces in a container with 3D shape. Then each 3D shape has its own sprite instance to go with it, and it will use the current animation frame of its own sprite instance. So then you can control the face images independently by controlling each of the sprite instance's animations independently.
But I'm totally lost. It really doesn't do anything I want, it just take the same sprite from the family and don't make a difference between the instances. Just repeating the same thing…
If anyone has the solution, I will be so grateful…🙏
(I'm a little desperate now)