Apple Motion 3 - Manual (Page 861)

Chapter 10 Using Filters 861
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.
Sides: Sets the number of sides of the lens aperture, if Circle is set to Off. Values range
from 3 to 12.
Rotation: Sets the angle of rotation of the polygonal lens aperture, if Shape is set to
Polygon.
Aspect Ratio: Sets the aspect ratio of the lens aperture. Values range from 0 to 2.
Crop: Toggles whether or not the blur will be cropped at the object’s original border.
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 same controls as the Inspector, with the exception of the Crop
checkbox.
Directional Blur
Blurs an object out along a specific angle. This filter creates a blurred streaking effect.
Original image Defocus applied