- 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 oflive-action footage andcomputer 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 affordableanimation andcompositing 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 inpre-production and production. Avisual 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 painting s and stills: digital or traditional paintings or photographs which serve as background plates for keyed orrotoscope d elements
*Live-action effects: keying actors or models throughbluescreen ing 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 ofspecial 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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