High heat and humidity are the main risks: condensation can instantly fog lenses and may damage gear. If possible, avoid bringing camera equipment into a fully heated steam room. A safer approach is to keep the room cooler and simulate the look with fog/fake steam and glycerin-water spray for “sweat” on skin.

If you do shoot in that environment, keep gear in a moisture-resistant case and let it gradually warm to room temperature before opening it, so moisture doesn’t condense on the camera and lens. Keeping lenses slightly warmer than ambient can also help reduce fogging.

To make steam visible on camera, light it from behind or from the side. Use controlled lighting such as barn doors or other modifiers so the light hits the subjects and steam selectively, rather than turning the whole room into a bright haze. A fan can help shape and move the steam, either clearing it from faces or making it look more dynamic.

If the location matters, scout it first so you understand how the real steam room looks and how much effect you may need to fake for the shoot.