Apple Motion 3 - Manual (Page 860)

860 Chapter 10 Using Filters
When this filter is initially applied, Compound Blur behaves as if there was a black
image applied to the Blur Map well, which will not blur any part of the target.
This filter causes rasterization in 3D groups.
To add an image to the Blur Map image well:
1 Use the File Browser to find the object you would like to use as a blur map.
2 In the Project pane, click the Media tab.
3 Drag the desired object from the File Browser into the Media tab.
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.
Mix: Sets what percentage of the original image is blended with the blurred image.
Values range from 0 to 100%.
HUD Controls
The HUD 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.