* To create special effects. Fog can be used to create a variety of special effects, such as smoke trails or fog banks.
* To hide or reveal objects. Fog can be used to hide objects from view, or to reveal them in a dramatic way.
* To create a sense of depth. Fog can create the illusion of depth, making a space appear larger than it actually is.
* To affect lighting. Fog can scatter light, creating a soft, diffused glow. This can be especially effective when using spotlights or other bright lights.
In addition to these practical uses, fog can also be used to create a sense of anticipation or suspense, to build atmosphere, or to create a sense of isolation.