5.5

1062Motion User Guide
• Black, White: Click the disclosure triangle in the Spill Contrast row to reveal sliders
for the Black and White point parameters. These sliders, which mirror the settings of
the Spill Contrast handles described above, allow you to keyframe the Black point and
White point parameters (via the Add Keyframe button to the right of each slider).
• Tint: A slider to restore the natural color of the keyed foreground subject. Because the
Spill Suppression controls eliminate blue or green spill by desaturating subtle blue or
green fringing and reflection on the subject, the Tint slider lets you add hues to restore
the natural color of the subject. Overdoing this parameter results in over-tinting the
subject with the complementary color of the hue being suppressed—magenta if green,
and orange if blue.
• Saturation: A slider to alter the range of hues introduced by the Tint slider (when the
Tint slider is used at moderate levels).
Light Wrap controls
Click the disclosure triangle in the Light Wrap row to reveal controls for blending color and
lightness values from the background layer of your composite with the keyed foreground
layer. Using these controls, you can simulate the interaction of environmental lighting with
the keyed subject, making it appear as if background light wraps around the edges of a
subject. In the following image on the right, with Light Wrap applied, environmental lighting
from the orange sky background layer “wraps around” the edges of the candle and the
right edge of the woman’s hair.
In Motion, the Light Wrap operation blends light and dark values from the background with
the edges of the keyed foreground subject, and can be used to create color-mixing effects
around the edges of the solid part of a key to better marry the background and foreground
layers of your keyed composite.
Light Wrap is the last operation in the image-processing pipeline. In other words, the
light-wrap effect is added after every other image operation is processed, including filters,
lights and shading, and other composited effects. As a result, Light Wrap accounts for any
other visual effect that might alter the look of the object it is applied to, yielding the most
desirable result.