How to delete parts of an image using alpha of another imag?

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

THREAD CLOSED
 
Thread Tools Search this Thread Display Modes
  08 August 2012
How to delete parts of an image using alpha of another imag?

I have made 2 image sequences passes 1 with alpha channel the other one with ambient occlusion.

I want to compose them both, but when I do it, it leaves out white grey surrounding from the ambient occlusion.



How do I delete it? How do I take alpha channel values and delete the ambient occlusion sequences, so I could have a nice image sequence with ambient occlusion and with alpha channel preserved.



I can do it in Photoshop by using magic wand clicking on the image with alpha selecting the transparent part then click on the ambient occlusion image and delete the parts I don't want and apply multiply and then merge the layers.



But how do I do it in after effects I have like 200 images by hand in PS it will take ages.



Thank you for any suggestions.

Last edited by monster4ever : 08 August 2012 at 09:18 PM.
 
  08 August 2012
I sorted it out, put AO above your alpha and set alpha's TrkMat to None, then check/click your AO Preserve Underlying Transparency. It will become available as soon as you set alpha's TrkMat to None.
 
  08 August 2012
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
__________________
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
 
Thread Closed share thread



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
CGSociety
Society of Digital Artists
www.cgsociety.org

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump
Miscellaneous

All times are GMT. The time now is 10:59 AM.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.