Apple Shake 4 Tutorials User Manual

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174

Chapter 5

Using Keylight

Here is the crucial trick:

In the Over1 parameters, activate preMultiply.

The nasty gunk around the character is removed.

For the color correction:

Once again, you are matching a foreground image to a limited background image.

Load the Compress parameters by clicking on the right side of the node.

In the Compress node parameters, click the Low Color control and scrub in the dark
corner of the background.

The low color is selected.

To select the high color, click the High Color control and scrub on a bright portion of
the background.

Note: In the Color Picker, Use Source Buffer is off. This is good, since you want to scrub
color from the composite rather than from the unpremultiplied image coming out of
Keylight.