10 Facts About Special effects

Special effects are illusions or visual tricks used in the theatre, film, television, video game, amusement park 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 Special effects are usually accomplished during the live-action shooting.

Optical Special effects are the techniques in which images or film frames are created photographically, either "in-camera" using multiple exposure, mattes or the Schufftan process or in post-production using an optical printer.

Special effects placed a Mary dummy in the actor's place, restarted filming, and allowed the executioner to bring the axe down, severing the dummy's head.

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From 1910 to 1920, the main innovations in special effects were the improvements on the matte shot by Norman Dawn.

Since the 1990s, a profound innovation in special effects has been the development of computer generated imagery, which has changed nearly every aspect of motion picture special effects.

Practical Special effects require significant pre-planning and co-ordination with performers and production teams.

Live special effects are effects that are used in front of a live audience, such as in theatre, sporting events, concerts and corporate shows.

Mechanical Special effects encompass the use of mechanical engineering to a greater degree.