The new FX series Legion premiered this week to lukewarm ratings, but all-around critical praise for its inventive production. The show is part of Marvel's X-Men franchise with a complicated premise: its protagonist David Haller is known as "Legion" because of his multiple personalities—over 200 of them—each of which has a different ability or power that he can channel.

Unlike many superhero movies and shows that feature elaborate action on sweeping sets, the drama of Legion plays out largely in the mental hospital where Haller is a patient, and even within characters’ consciousnesses. This created a particular opportunity and challenge for production designer Michael Wylie, who recently worked on another Marvel Universe show, ABC’s Agent Carter.

See how Wylie approached the creation of the hyper-realistic, 360-degree sets and an innovative lighting system that enabled the show’s cast to “leave reality behind.”