Apple Shake 4 Manuel d'utilisateur télécharger pdf (Page 86)

86 Chapter 1 An Overview of the Shake User Interface

The two main keyers in Shake, Keylight and Primatte, recognize the background color,

and have a toggle to key the background color in or out. By default, the keyer leaves

the background area black in the alpha channel. To turn the background completely

white, toggle BGColor on.

Shake processes color correction of the BGColor very quickly, as it recognizes there is a

pure correction applied to previously black pixels. If the color correction does not

change black, such as Gamma or Mult, it is ignored. If it does affect the black areas, as

does Add or Compress, it processes these areas, but understands that they are still the

result of a lookup process. Therefore, the DOD does not get reasserted to the resolution

frame. This is the same process that is used when the Infinite Workspace kicks in. So,

even though the pixels outside of the DOD are not visibly different from the pixels

inside, the DOD remains in place. (For more information, see Chapter 7, “U

sing the Node

View,” on page 217.)

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Apple Shake 4 Manuel d'utilisateur Page 86