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Chapter 12 Keyingandcompositing 393
5 Click Light Wrap to reveal the following controls:
 Amount: Use this slider to control the overall light wrap eect, setting how far into
the foreground the light wrap extends.
 Intensity: Use this slider to adjust gamma levels to lighten or darken the interaction
of wrapped edge values with the keyed foreground subject.
 Opacity: Use this slider to fade the light wrap eect up or down.
 Mode: Use this pop-up menu to choose the compositing method that blends
the sampled background values with the edges of the keyed subject. There are
ve modes:
 Normal: Evenly blends light and dark values from the background layer with the
edges of the keyed foreground layer.
 Lighten: Compares overlapping pixels from the foreground and background layers,
and then preserves the lighter of the two. Good for creating a selective light
wrap eect.
 Screen: Superimposes lighter portions of the background layer over wrapped areas
of the keyed foreground layer. Good for creating an aggressive light wrap eect.
 Overlay: Combines the background layer with the wrapped areas of the keyed
foreground layer so overlapping dark portions become darker, light portions
become lighter, and colors become intensied.
 Hard Light: Similar to the Overlay composite mode, except that colors become
muted.