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To change the Key Input settings for a node connected to a Key Mixer:
1 In this example, Node 2 is isolating part of the midtones of the image, and feeding its key through
the Key Mixer to Node 4, which is using it to apply a partial blue tint. However, in preparation for
subtracting the skin tone from this operation, Node 3 is isolating the man’s skin tone.
A node setup in preparation of subtracting the Bar sign from
the midtone isolation being used to add a partial blue tint
2 To reveal the controls you’ll use to change how the key from Node 3 interacts with the key from
Node 2, double-click the Key Mixer node to select it.
3 Open the Key palette; a list of all input links that are connected to the Key Mixer appears at
the right.
The input list of the Key Mixer node
4 Within each list entry is the input name (Input Link 1, Input Link 2, etc.), a Matte control,
a Mask control, a gain parameter, and an offset parameter.
Chapter 142Combining Keys and Using Mattes 2819
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