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595Final Cut Pro User Guide
Make advanced chroma key adjustments
The following controls are available for use in difficult keying situations or for fine-tuning
specific problems:
• Color Selection: These controls are meant to be used after you begin creating a key
using automatic sampling or the Sample Color and Edges tools. (However, you can
skip those tools and create a key using Manual mode, described below.) The graphical
Chroma and Luma controls provide a detailed way of refining the range of hue,
saturation, and image lightness that define the keyed matte.
• Matte Tools: These controls are for refining the transparency matte generated by the
previous sets of parameters. These parameters don’t alter the range of values sampled
to create the keyed matte. Instead, they alter the matte generated by the Keyer effect’s
basic and advanced controls, letting you shrink, expand, soften, or invert the matte to
achieve a better composite.
• Light Wrap: These controls are for blending color and brightness 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.
1. In the Final Cut Pro timeline, select the foreground clip with the Keyer effect, then open
the Video inspector.
Controls for modifying and improving the Keyer effect appear.
2. Click Color Selection to reveal the following controls: