ADOBE AFTER EFFECTS: Forum Expressions Tutorials Creative Cloud

How to remove edge on a "Alpha Invert Matte" ?

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Justin Mettam
How to remove edge on a "Alpha Invert Matte" ?
on Oct 11, 2013 at 4:35:22 am

I am trying to key out the character so all that is left is his ground contact shadow. So I did a Alpha invert Matte on the beauty pass to cut out the character from the ambient Occlusion pass and then keyed it all onto a white solid. As you can see from my screen grab I am left with a fine hairline around the edge. What is the technique to remove this edge ?

I am guessing I should crush the levels on the Alpha of the layer I am using as a matte ? Is there a better approach ?




Return to posts index

Tudor "Ted" Jelescu
Re: How to remove edge on a "Alpha Invert Matte" ?
on Oct 11, 2013 at 7:32:50 am

Use a Matte Choker

Tudor "Ted" Jelescu
Senior VFX Artist


Return to posts index

Darby Edelen
Re: How to remove edge on a "Alpha Invert Matte" ?
on Oct 20, 2013 at 4:02:15 pm

I would extend the alpha of the matte layer outward some using either matte>simple choker or channel>minimax set to maximum operating on the alpha channel.

This may eat into the contact shadow some in which case you could roto a copy of the matted ambient occlusion pass to bring it back.

Darby Edelen


Return to posts index


Justin Mettam
Re: How to remove edge on a "Alpha Invert Matte" ?
on Oct 20, 2013 at 9:23:27 pm

Thanks for responding. I ended up using this light wrap tutorial that someone posted.

http://maltaannon.com/articles/after-effects/ce-lightwrap/


Justin Mettam
PreViz & 3D-Generalist
mettam@hotmail.com
415 261-7633
http://mettam.wix.com/3dartist


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]