model (someone or something) in (something)
To create a model figure of some person or thing in a given substance or medium. The artist models various characters from literature, film, and pop culture in scrap metal he collects from the junkyard at the edge of town. We'll model you with clay, and then use that model to create the statue.
model something in something
to make a model of something in a particular substance. She modeled the figure in clay. I modeled a bear in modeling clay.