I wanted to pin this photo to see a professional set up for using lighting gels. Here there is technology used including a stand with the lighting gel over the light which is being bounced onto a stand with lines in to created shadow on the model.
Forced perspective is a technique that employs optical illusion to make an object appear farther away, closer, larger or smaller than it actually is. It is used primarily in photography, filmmaking and architecture. It manipulates human visual perception