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Combining Qualifiers and Windows
This is covered in more detail in a subsequent section, but if you create a key using one of the
Qualifier modes, and you then add a Window, the final key that’s output by that node is limited
to the intersection of the Qualifier key and the Window. This makes it easy to use a Window to
“garbage matte” out bits of a key that you don’t want, that can’t be eliminated by further
adjustment of the Qualifier controls.
(Top) The woman’s skin tone is too close to other elements in the scene.
(Bottom) A Circular Power Window is used to further isolate the woman being isolated.
Manipulating Keys Using
Additional Nodes
If you need to make more adjustments to a qualified key than the Matte Finesse controls will
allow, you can use the Node Editor to feed the key output of one node to the RGB input of
another, at which point you can use all of the second node’s color adjustment controls to
manipulate the grayscale image that constitutes that key, to improve it.
Connecting a key output to an RGB input, and then connecting
the RGB output back to the next node’s KEY input again
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