Apple Motion 2 - Manual (Page 717)

Chapter 10 Using Filters 717
4 In the Filters tab of the Inspector, select the Compound Blur filter.
5 Drag the desired object from the Media tab into the Blur Map image well of the filter.
Parameters in the Inspector
Amount: Sets the radius of the blur. Values range from 0 (no blur) to 32.
Blur Map: An image well that displays a thumbnail of the map chosen.
Map Channel: Selects the channel to be blurred. The blur is applied to the red, green,
blue, alpha, or luminance channel.
Invert Map: Sets whether or not the blur map is inverted.
Stretch Map: Sets whether or not the map is stretched.
Horizontal: Sets the percentage of maximum horizontal blur.
Vertical: Sets the percentage of maximum vertical blur.
Crop: Toggles whether or not the blur will be cropped at the object’s original border.
Dashboard controls
The Dashboard contains the Amount, Blur Map, and Map Channel controls.
Defocus
A more accurate model of the out-of-focus effect that occurs through a real-world
camera lens. The Defocus filter blurs an image while creating a controlled glow effect in
brighter areas of the image. The resulting object has a lens aperture-shaped structure
around the highlights. The shape of the blurred glow around the affected highlights
can be customized.
Use this filter when you are trying to blur one image to match video or stills that were
shot with a camera. For example, if you have keyed a woman standing in front of a
bluescreen, and you intend to place a background image behind her to make it look
like she’s standing in a valley with mountains in the background, use the Defocus filter
instead of a Gaussian Blur to create a realistic depth-of-field effect for the mountains in
the distance.
Parameters in the Inspector
Amount: Sets the radius of the defocus. Values range from 0 (in focus) to 16.
Gain: Sets the amount of gain applied to the high luminance areas. Values range from
0.05 to 4.
Shape: Sets the shape of the lens aperture. Circle or Polygon.
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