User Manual

Hovering the pointer over a source
identifies it in a tooltip
Generally, sources are arranged from top to bottom from the first MediaOut node appearing in
a Fusion composition to the last. At this point, you can connect the second Source to the Key
input of a second corrector node, using that key to selectively grade just the woman in the
foreground (grade exaggerated for effect), without affecting the background. The Viewer is
shown with Splitscreen set to Highlight Modes, so you can see the result as well as the key from
the Fusion page that’s being used by Node 2.
Connecting the second source to a second Corrector node’s KEY input to use the matte to limit a correction
made to the foreground character
Using the Key Mixer
The Key Mixer node lets you mix keys output from multiple Corrector nodes, combining them in
different ways to create a single key output. This makes it possible to build much more intricate
keys than you can with a single qualifier or set of four windows. In particular, the Key Mixer node
is the only way to combine multiple keys made using qualifiers and windows, adding,
subtracting, or intersecting them to create a highly specific result.
Adding Two Keys Together
In the following example, you’ll learn how to set up a Key Mixer to combine the keys output by
two Corrector nodes in a node tree. Then you’ll learn how to change the way the input keys are
combined using the Key palette.
To combine two or more keys using the Key Mixer:
1 Right-click anywhere on the gray area of the Node Editor, and choose Add Node >
KeyMixer.
2 Create two Corrector nodes, then attach their RGB inputs to the RGB output from an
appropriate node in the main part of the tree, and attach their key outputs to the key
inputs of the Key Mixer.
Chapter – 126 Combining Keys and Using Mattes 2868