CGTalk - Dont understand the over node

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nanni700

12-16-2008, 08:05 AM

Hi,
sorry about this stupid question but:
i have to put an image over a second image. The first one has a quickshape mask. But the area of the forground image is always too bright. When selecting the premultiplied button the forground disappears.

What happens?

Thanks again for help,
nanni700

Kai01W

12-16-2008, 09:48 AM

A + (B * (Aalpha * -1 ))

SeaJackal

12-16-2008, 12:59 PM

in the file in node turn on auto alpha

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