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Graphic with alpha channel issues
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[JeremyG] “the original poster turned his alpha to black”
That alone is a very bizarre statement. What does that mean? An alpha is a greyscale image signifying which area is transparent. Do you mean he premultiplied it with black? Yes, that is the only type of premultiplied that most apps support. Some in the past used white. But, when the inferior premultiplied method doesn’t work right, you’d get a white fringe which is even nasier than a black fringe.
He does practically say that straight is superior EXCEPT that premultiplied renders faster (out of AE) and doesn’t scare clients. However, straight has no issues of potential black fringe. Premultiplied does.
Did we watch the same video?
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[Bret Williams] “That alone is a very bizarre statement. What does that mean?”
In FCP, you can choose what type of alpha the clip has in the browser. The choices are “Straight”, “Black” or “White”.
Are we using the same application?
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Hey, no need for post ‘battling’. We are all here to learn..and there aree lots of good points being made.
That tutorial definitely helped me understand what was going on with diffrerent types of embedded alphas. And it also good to know how to handle what every comes ur way in FCP, thus being able to know how to change the alpha channel setting in the Format interface is also important…
It is also good to hear how operators favor one way or the other…
Happy cuttin all!
Liam Lawyer
-editor-
Wee Beastie
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