Miles Davis composed the Elevator to the Gallows (1958) score in a single session while watching the film. After noting a rough cut, he gathered 4 musicians without rehearsal & recorded it in one take, creating a landmark in improvised film scoring.
Costume design is always in service of the story.
Fashion answers to the marketplace.
Costume design helps bring the world of a film to life.
Every decision—color, fabric, silhouette—is made to reveal character in a specific moment, under specific circumstances.
From that perspective, writing novels and designing costumes have a lot in common.
Different mediums.
Same goal: To tell a story.