What samples are there in the photography?

A sample is a small amount of physical objects that can represent the quality of goods. The studio sample is to find a professional model and make a commercial film. In fact, most of the samples in the studio are not taken in their own studio, because taking samples requires a lot of manpower and material resources, and the studio often chooses shortcuts, resulting in samples and sometimes good new works being taken in the studio. For various reasons, customers don't want to leave samples in the photo studio, that is, customer samples, so many photo studios choose model samples bought by outsiders.