What is the difference between fog and haze?

Fog and haze are both atmospheric effects that make light beams visible in the air, but they behave very differently. Haze produces a subtle, even suspension of particles that fills a room with a thin atmosphere. It's not meant to be dramatic or visible on its own. Its purpose is to reveal light beams and add depth to the visual picture without calling attention to itself. Haze output is a slow, steady stream that builds gradually.

Fog produces dense, dramatic bursts of visible vapor, similar to a steam engine's output. Fog creates a thick, concentrated atmosphere that can obscure visibility and create a heavy, moody, or mysterious look. Fog dissipates faster than haze, so it requires more fluid and continuous operation to maintain. In most professional event applications, haze is the standard atmospheric effect because it enhances the lighting design without overwhelming the visual environment.