These audition pieces are usually video taped, typically in the form of screen tests and then attached with resumes, as well as head shots and or viewed online via websites such as IMDb, then shared with film producers, film directors and or studio executives. Later stages may involve groups of actors both union, (SAG-AFTRA) and non union depending on the size and scope of the production, attempting to read material from the work under consideration, paired off in various combinations of two, three or more. With each of the actor's overall motivational choices evaluated, the casting panel considers both the individual actor, and the "chemistry" created from either one of the combinations set forth within the read-through, such as boy meets girl, etc.