Over 5 days of filming, the director documented their progress shooting scenes that establish the protagonist's obsession with photography through close-ups of her examining photos in a bedroom and darkroom, introduce the idea that someone may be stalking her through shots of a figure running and her looking around nervously, and capture her vulnerability through isolated nature shots on Hampstead Heath that suggest she is being watched from a distance. Minor issues like weather inconsistencies, costume problems, and interruptions from the public were worked through to complete the essential footage needed to tell the story in the trailer.