Table of contentsNo headers Grain is a basic characteristic of
film that is derived from the individual silver halide crystals
randomly distributed across an image. The random distribution of
these crystals creates the visual impression of graininess,
which adds a distinctive look to film. In addition, different
film stocks have different grain signatures. You can use grain
management tools to create convincing composites between video,
or CG-generated elements, and film material. The DeGrain and
ReGrain tools are useful in a number of scenarios. For example:
- If you are pulling keys from key-in film clips, film grain can
make generating a clean matte more difficult. Using the DeGrain
tool, you can remove the grain from the key-in clip, generate
the matte from that clip, and apply the matte to the original
grainy key-in clip. The result is a clean, precise matte applied
to a properly grainy film clip. - If you are mixing film clips
originating from different film stocks, you can match the grain
in the clips