
Special effects are illusions or visual tricks used in the theatre, film, television, video game and simulator industries to simulate the imagined events in a story or virtual world. Special effects are traditionally divided into the categories of mechanical effects and optical effects.
Mechanical Effects
Mechanical Effects (also called Practical or Physical Effects), are usually accomplished during the live-action shooting. This includes the use of mechanized props, scenery and scale models. Making a car appear to drive by itself, or blowing up a building are examples of Mechanical Effects. Mechanical Effects are often incorporated into set design and makeup. For example, a set may be built with break-away doors or walls, or prosthetic makeup can be used to make an actor look like a monster.

Optical Effects
Optical effects (also called photographic effects) are techniques in which images or film frames are created photographically, either “in-camera” using multiple exposure, mattes or the Schüfftan process or in post-production using an optical printer.


