This document discusses how costumes in films are influenced by various factors such as time period, age, mental state, and social group of the character. It provides examples of how costumes reflect different time periods, like the futuristic bodysuits in Tron Legacy and historically accurate costumes in The Duchess. Costumes also reflect a character's age, personality, and social group to help audiences distinguish these traits and understand the character. A character's mental state can also be shown through their costume, like the disheveled appearance of the character in Secret Window reflecting his reclusive state of mind.