difference matting

Posted by Logan6 
difference matting
January 14, 2007 12:28AM
Hello. I would like to place a white circle (created on a psd layer and imported) onto another white circle (psd layer imported) in FCP and have a new negative space created in the shape of the smaller circle. In other words, it would be the same effect as applying the "difference" setting on a layer as seen in Photoshop except in this case I would use two video tracks in FCP.

Like So...

How could I do this in FCP? Mattes?

Thank you.
Re: difference matting
January 14, 2007 12:53AM
Put the top layer into a 'Difference' composite mode: Modify - Composite - Difference.

Re: difference matting
January 14, 2007 01:03AM
Ha! Great! It worked. how simple. Thank you.
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