Adobe After Effects CS3 User Manual
Page 277
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AFTER EFFECTS CS3
User Guide
272
Gray Level Softness
Specifies how soft to make the edges of the matte. At 0%, the matte edges contain only fully
opaque and fully transparent values. At 100%, the matte edges have a full range of gray values but may appear
blurred.
3
Set stage-two controls (the next three properties) to choke the matte by the same amount as that by which you
spread it in stage one.
4
(Optional) Use the Iterations property to specify how many times After Effects repeats the spread-and-choke
sequence. You may need to try a few different settings so that the sequence is repeated as many times as necessary to
close any unwanted holes.
See also
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