Maquette sculpture (with a few 3D models and final products mixed in).

Historically a maquette (French word for scale model, sometimes referred to by the Italian names plastico or modello) is a small scale model or rough draft of an unfinished sculpture

In entertainment a maquette is a sculpture which animators or illustrators use as a character reference. It's a way of getting a real 3 dimensional view of something that doesn't really exist.