To create a film noir look, focus on lighting and mood more than any single camera setting. The key traits are low-key lighting, strong contrast, deep shadows, and a dramatic feel.

Start in a dark setting and use side lighting to emphasize shape and shadow. Keep light controlled so it doesn’t spill everywhere—tools like flags, black reflectors, or barn doors can help increase contrast by subtracting fill light. Silhouettes and partially lit faces also fit the style well.

Patterned light is very common in noir. Use a gobo/cookie—such as window blinds, foliage, or other objects placed between the light and scene—to cast shadow patterns on the background or subject.

For atmosphere, you can add a little haze or fog for mood if appropriate.

In post-processing, black and white is common, though not mandatory. Adding contrast, some grain, and possibly a vignette can help reinforce the look. There isn’t one strict formula, so studying film noir reference images and experimenting with dramatic setups is an important part of getting the style right.