Apple Motion 3 - Manual (Page 924)

924 Chapter 10 Using Filters
Primatte RT
The Primatte RT filter is a high-quality keying filter, which renders the blue or green
areas of the image transparent, allowing one or more background images to show
through.
Parameters in the Inspector
Output Type: Sets the output type of the keyer. Select values from the following:
Foreground, Background, Processed Foreground, and Matte.
Backing Color: Pick the backing color for the matte. Use the disclosure triangle to
display Red, Green, Blue, and Alpha sliders for more precise color selection. In addition,
clicking the color well opens the Colors window, which allows you use the color picker
to select a color from the object.
Auto Sample: Automatically samples the dominant color type in the image to be used
for the key. Select Red, Green, or Blue.
Replacement Color: Picks the color to be used to fill in pixels in spill and transition
areas. The intelligent edge smoothing of the Primatte RT filter can take pixel color
values from the background to substitute in spill and transition areas.
Noise Removal: Sets the threshold for noise removal. Values range from 0 to 0.94.
Matte Density: Sets the density of the matte. Values range from 0 to 1. This value
cannot be set to a value lower than Noise Removal.
Spill Suppression: Sets the amount of spill suppression applied to the matte. Values
range from 0 to 1. This value cannot be set to a value lower than Noise Removal.
HUD Controls
The HUD contains the same controls as the Inspector.
Original image Primatte RT filter (Backing Color set to
Green), so background tiger shows through