ADOBE AFTER EFFECTS: Forum Expressions Tutorials Creative Cloud

Alpha Channel

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Dale PaquetteAlpha Channel
by on Jun 21, 2011 at 1:20:38 pm

Is there a way, after making a selection in AE to make it into an alpha channel without having to render the footage out first?

When using Keylight, is there a way to save the screen matte as a separate item so that it can be used elsewhere for other purposes?

Return to posts index

Dave LaRondeRe: Alpha Channel
by on Jun 21, 2011 at 2:34:33 pm

If you render Alpha Channel Only, you'll end up with a B&W piece of footage, where 100% black is totally transparent, 100% white is totally opaque, and anything in between is varying degrees of opacity. You can then use it as a luma matte in other applications.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA

Return to posts index

Michael SzalapskiRe: Alpha Channel
by on Jun 22, 2011 at 6:41:41 pm

And, to answer your first question, yeah. Just precomp it and use it as a track matte.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.

Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 All Rights Reserved