The later stages of feature film casting involve working more closely with material, the director, screen partners and sometimes even being put on film. Working with other actors, especially for ensemble productions, help reveal what chemistry is or is not present among a group of performers. Screen tests are typically done late or after a production is cast and involve making hair, make-up, wardrobe, film-stock and lighting decisions. Feature films may use a screen test to decide final actor placement or to make difficult final casting decisions, but most of the time a production won’t spend money on screen testing actors it doesn’t intend to use.