transparent pixels

Dar Scott dsc at
Thu Mar 21 14:13:01 EST 2002

When I paint on a new image, those places where I don't paint are 

How does this work?

(I suppose "pretty good" is to be an expected answer.)

Does this use a color key?  The maskData?  The alphaData?  An 
special entry into a color table?

Dar Scott

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