Apple Motion 2 - Manual (Page 860)

860 Chapter 12 Using Shapes and Masks
Feathering Masks
One of the easiest ways to adjust a mask is to feather its edges. Feathering a mask by a
few pixels can make the masked object blend more seamlessly with a background.
Feathering a mask by larger amounts allows you to create progressively softer edges
for a variety of design purposes.
You can feather mask edges either outward or inward. The direction in which you
feather a mask is dictated by the subject you’re masking. When rotoscoping a subject, a
combination of masks using both inward and outward feathered masks may be
necessary for the best results.
To feather the edge of a mask:
1 Select a mask.
2 Open the Mask tab in the Inspector.
Feathered in (color channel) Feathered in (alpha channel)
Feathered out (color channel) Feathered out (alpha channel)
01112.book Page 860 Sunday, March 13, 2005 10:36 PM