![]() Mechanical effects (also called practical or physical effects) are usually accomplished during the live-action shooting. For example, for a science fiction movie about a world with three suns, the filmmaker could hire computer experts to create an image of three suns which would appear in the background of the movie scenes. For this reason, filmmakers use special effects to create images that look like other planets. It would be impossible to actually make a science fiction movie on another planet. They usually tell imaginary stories that take place in the future, on other planets. Science fiction movies also often use special effects. A movie maker could make a little model of a battleship that is only a few yards or meters long, and then blow it up while filming with the motion picture camera. For this reason, most action movies use special effects if they want to show something blowing up in flames. For example, if an action movie shows a very big battleship blowing up in flames, it would be expensive to buy a battleship and dangerous to blow it up. ![]() There are many different types of special effects, for example, making little models or using computer animation.Īction movies often use special effects to create images that would be dangerous or cost a lot of money to create in real life. Special effects is a term for the things used in movies to create images that do not exist. As a result, many optical and mechanical effects techniques have been superseded by CGI.Bluescreens are commonly used in chroma key special effects. It gives filmmakers greater control, and allows many effects to be accomplished more safely and convincingly and-as technology improves-at lower costs. ![]() Since the 1990s, computer-generated imagery (CGI) has come to the forefront of special effects technologies. An optical effect might be used to place actors or sets against a different background. 日本語Optical effects (also called photographic effects) are the 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. For example, prosthetic makeup can be used to make an actor look like a non-human creature. Mechanical effects are also often incorporated into set design and makeup. This includes the use of mechanized props, scenery, scale models, animatronics, pyrotechnics and atmospheric effects: creating physical wind, rain, fog, snow, clouds, making a car appear to drive by itself and blowing up a building, etc. ![]() With the emergence of digital film-making a distinction between special effects and visual effects has grown, with the latter referring to digital post-production and optical effects, while "special effects" refers to mechanical effects. Special effects are traditionally divided into the categories of mechanical effects and optical effects. A special effect of a miniature person from the 1952 film The Seven Deadly Sins
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