

Putting blinds, bars or leaves (a gobo or cookie) in front of the light casts striped or patterned shadows on walls and faces. It gives a noir mood and the sense of a window just off screen.
Offices, interrogation rooms, night interiors, noir and mystery tones, moody shots with swaying leaf shadows.
Public AI example available — The 'Gobo Projection (Window Blinds & Patterns)' section of the 20 AI lighting prompts video
Film noir mood, hard light through venetian blinds, sharp striped shadows cross a detective's face and the office wall as he sits at a desk, dust drifting in the narrow beams, slow push-in, 50mm lens, black and white, high contrast, brooding mood, 5-second shot.
hard light through venetian blinds, striped shadows across her face and the wall, film noir mood
Double Indemnity (1944) — Cinematographer John F. Seitz used blind shadows to make the characters look trapped behind bars. Blind shadows are the signature image of film noir (Wikipedia — Film noir).
AI Filmmaking: The Ultimate Guide to Cinematic Lighting (20 Prompts)