Atmospheric effects generated for entertainment or industrial purposes employ specialized equipment to create either a diffuse, lingering haze or a denser, more localized fog. A haze machine uses oil-based or water-based fluids to produce fine, airborne particles, resulting in a translucent effect that enhances lighting and laser beams. Fog machines, conversely, typically use water-based fluids, sometimes with added glycerin or glycol, to create a thicker, opaque cloud that obscures visibility. An example of this distinction can be seen in theatrical productions where haze might be used to highlight stage lighting throughout a scene, while fog might be employed for a specific dramatic entrance.
The ability to control atmospheric visibility plays a crucial role in numerous applications. From enhancing the visual impact of live performances and creating immersive environments in themed attractions to providing realistic training scenarios for firefighters and military personnel, these technologies offer valuable tools for various professionals. Historically, simpler methods like dry ice or burning materials were employed, but modern machines provide significantly greater control over density, duration, and dispersion, improving safety and artistic precision.