Many of the big spaces in the "Homecoming" set, including Heidi's office, are octagonal. All eight sides of Heidi's office could be pulled away to optimize the choice of camera angles.
Catherine Marie Thomas used different color palettes to differentiate the costumes in the story's two distinct time periods. There's no blue in the 2018 designs, while the 2022 costumes incorporate more saturated colors.
Anastasia White's color palette for "Homecoming" involves a lot of greens, browns, reds and yellows. Blue, which suggests calm and comfort, was mostly eliminated to help create a sense of tension that tied back to the tone of the podcast.
When Sam Esmail asked his "Mr. Robot" production designer, Anastasia White, to come aboard "Homecoming," she purposely tried not to visualize the story when she first listened to the podcast version. She thought it would be a fun challenge to visualize a story that originally used audio to set its tone.
In the 2022 scenes, Heidi (Julia Roberts) has regressed and is living with her mother. To reflect this, costume designer Catherine Marie Thomas gives Heidi a younger look, with subtler prints in her tops and putting her in pants instead of dresses.