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Creating a Mask for a Highlight Matte Object

A highlight matte object is a special type of overlap object.
It overlays the entire vignette. For most object types, you mask the entire outline of each object. For highlight matte objects, you specify areas of brightness and, within those, specific highlights. You distinguish between these areas by their degree of opacity.
You can use the [Trace] tool or the [Mask Brush] to create the mask for a highlight matte object. Other Mask page tools do not support opacity.
You cannot use the Add or Subtract controls when you define the mask for a highlight mask object. To subtract from a mask area you've defined, set the Opacity slider to zero and brush over that area.
To Create a Mask for a Highlight Matte Object:
  1. On the Mask page, choose the highlight matte object from the [Select Object] box .
  2. Select the Trace tool or Mask Brush .
  3. Set the Opacity slider for the broad areas of brightness. Usually this is a setting of approximately 50%.
  4. Define the areas of brightness for the image.
    You can define multiple, separate areas. Don't change the Feather setting to anything but zero, the highlighting feather the edges.
  5. Set the Opacity slider for the highlights within the areas of brightness. Usually this is a setting of approximately 100%.
  6. Define the highlights within the areas of brightness.
    Usually these are small areas centered within the broader areas of brightness, indicating the reflection of a point of light.
    Once you've defined the two extremes on the Opacity slider, you can press the plus (+) and minus (-) keys in the numeric keypad on your keyboard to move between them.