Compositing is the combining of visual elements from separate sources into single images, often to create the illusion that all those elements are parts of the same scene. live action shooting for compositing is variously called “blue screen”, “green screen” and other names.
Visual effects are often 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. While special effects such as explosions and car chases are made on set, visual effects are primarily executed in post-production with the use of multiple tools and technologies such as graphic design, modeling, animation and similar software. A usually involved with the production from an early stage to work closely with production and the film’s director design, guide and lead the teams required to achieve the desired effects.
Rotoscoping is an animation technique that animators use to trace over motion picture footage, frame by frame, to produce realistic action. Originally, animators projected photographed live-action movie images onto a glass panel and traced over the image.
Match moving has two forms. Some compositing programs, such as skake, adobe after effects, and discert combistion, include two-dimensional motion tracking capabilities. Two dimensional match moving only tracks features in two-dimensional space, without any concern to camera movement or distortion. It can be used to add motion blur or image stabilization effects to footage. This technique is sufficient to create realistic effects when the original footage does not include major changes in camera perspective. For example, a billboard deep in the background of a shot can often be replaced using two-dimensional tracking.