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Table Of Contents
Important: A separate Light Wrap option appears in the Blend Mode pop-up menu of
the Properties Inspector for selected layer or group in Motion. The Light Wrap blend
mode in the Properties Inspector for a layer is ignored when you add a Keyer filter to that
layer and set the Light Wrap Amount parameter to a value greater then 0. (The Light
Wrap parameters of the Keyer filter take precedence.) However, if you set the Amount
parameter of the Light Wrap group to 0, the Light Wrap blend mode becomes active
again. Further, the Light Wrap blend mode in the Properties Inspector for a group overrides
the Light Wrap parameters of any Keyer filters in that group.
Amount: Use this slider to control the overall light-wrap effect, 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 effect 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 five 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,
then preserves the lighter of the two. Good for creating a selective light wrap effect.
Screen: Superimposes lighter portions of the background layer over wrapped areas
of the keyed foreground layer. Good for creating an aggressive light wrap effect.
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 intensified.
Hard Light: Similar to the Overlay composite mode, except that colors become muted.
Mix: Use this slider to set the percentage of the original image to be blended with the
keyed image. 100% is the fully keyed image, while 0% is the original, unkeyed image.
HUD Controls
The HUD contains the following controls: Strength, Jump to Sample, View, Fill Holes, Edge
Distance, Spill Level, and Invert.
649Chapter 13 Keying