Fog effects are used in various applications, including parties, dance clubs, Halloween haunted houses, popular music performances, Nutcracker ballets, Shakespearean dramas, horror films, fire safety training, and industrial testing applications.
The effects available range from wisps of smoke to impenetrable clouds, from mysterious low-lying fog to a thin mist in the air revealing dramatic shafts of light. The two prevalent “technologies” in use today for making theatrical fog effects involve 1) sublimating dry ice (frozen carbon dioxide) and 2) vaporizing a specially formulated fluid (typically glycol-water mixture).