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Nuke 101: Professional Compositing and Visual Effects, Second Edition by Ron Ganbar

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3. Compositing CGI with Bigger Node Trees

These days, Computer Generated Imagery, or CGI, primarily refers to images that are rendered out of 3D software such as Maya, 3ds Max, and Houdini.

Rendering in 3D software can be a very long process. Calculating all the physics required to produce a convincing image is very processor intensive. A single frame can take anywhere from a minute to eight hours or more to render. Because of this, 3D artists go to great lengths to give compositors as much material as possible so that they can modify the 3D render without having to go back to the 3D package and re-render.

Image

Compositors find it very hard to change ...

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