Judas Figure: a study referred to as a maquette

Judas Figure ( flattened to go into notebook) / study of Frida Kahlo
Originally uploaded by trudeau

Maquette: a sculptor's small preliminary model or sketch. From French, from Italian macchietta a little sketch.

Also, a usually small model of an intended work, such as a sculpture or piece of architecture.

In other words, fine arts students might want to make a large and painted Judas Figure. It would be a dramatic piece of work.