The Costume Designers Guild’s international membership includes motion picture, television, and commercial costume designers, assistant costume designers and costume illustrators, video game suit and totals over 750 members. “My goal was to honor the costume designers and creators of Tron,” he said. The National Costumers Association is an 80 year old association of professional costumers and costume shops. Costume design should not be confused with costume coordination, which merely involves altering existing clothing, although both processes are used to create stage clothes.