Visual effects

Visual effects

Visual effects (commonly shortened to Visual F/X or VFX) are the various processes by which imagery is created and/or manipulated outside the context of a live action shoot. Visual effects often involve the integration of live-action footage and computer generated imagery (CGI) in order to create environments which look realistic, but would be dangerous, costly, or simply impossible to capture on film. They have become increasingly common in big-budget films, and have also recently become accessible to the amateur filmmaker with the introduction of affordable animation and compositing software.

Timing

Visual effects are frequently integral to a movie's story and appeal. Although most visual effects work is completed during post-production, it usually must be carefully planned and choreographed in pre-production and production. A visual effects supervisor is usually involved with the production from an early stage to work closely with production and the film's director to achieve the desired effects.

Categories

Visual effects may be divided into at least four categories:
*Models: miniature sets and models, animatronics
*Matte paintings and stills: digital or traditional paintings or photographs which serve as background plates for keyed or rotoscoped elements
*Live-action effects: keying actors or models through bluescreening and greenscreening
*Digital animation: modeling, computer graphics lighting, texturing, rigging, animating, and rendering computer generated 3D characters, particle effects, digital sets, backgrounds, etc..

ee also

* Animation
* Computer-generated imagery
* 3D computer graphics
* Physical effects — another category of special effects
* Bluescreen
* Front projection effect
* Rear projection effect
* Compositing

External links

* [http://vfxy.com VFXY] - Visual Effects Portal

Further reading

* T. Porter and T. Duff, "Compositing Digital Images", Proceedings of SIGGRAPH '84, 18 (1984).
* The Art and Science of Digital Compositing (ISBN 0-12-133960-2)
*cite book |first=Shilo T.|last=McClean| title=Digital Storytelling: The Narrative Power of Visual Effects in Film | year=2007 | publisher=The MIT Press | id=ISBN 0-262-13465-9


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