In the design world, commissions generally come with prescriptive briefs; being given free rein is something of a rarity. “It’s a sign of extreme confidence in you and your artistic vision,” explains Garance Vallée, the artist and designer who has created set designs for the likes of Nike, Maison Margiela and champagne house Perrier-Jouët, developed a rug collection for Nordic Knots, and collaborated with Paraboot on a special edition of their signature derby shoes. “Rather than coming to me with a precise idea, brands call upon me for the universe I can create for them.”

The daughter of a painter and an artist’s agent, Vallée grew up in a home in which she was encouraged to express herself. She spent much of her childhood practicing ballet, drawing, visiting contemporary...