CGTalk > Software Specific Forums > Compositing Software > Adobe After Effects
To minimize the ads you see on this page create a CGTalk account and log in HERE
Thread Closed share thread « Previous Thread | Next Thread »  
 
Thread Tools Search this Thread Display Modes
Old 04-09-2013, 07:17 PM   #1
Artbot
Mostly Harmless
 
Artbot's Avatar
CGTalk Forum Leader
portfolio
Richard Green
The Man Who Sold the World
USA
 
Join Date: Dec 2001
Posts: 5,122
How to prevent effects from affecting alpha channel?

I have a shot where a vehicle is flying over a city. The vehicle is a sequence of 3D rendered TGAs with alpha. When I place it over the background and apply any effects, like contrast & brightness, those effects appear to be affecting the alpha channel (not good) as well as the RGB channels (good). This ends up creating an unwanted outline around the vehicle as I change the effects values. Is there a way to apply these effects without them affecting the alpha channel, too?

Also, I rendered the 3D elements with "pre-multiplied" on. Should it be off?


Thanks.
__________________
www.artbot.com


Last edited by Artbot : 04-09-2013 at 07:23 PM.
 
Old 04-09-2013, 07:17 PM   #2
CGTalk Moderation
Lord of the posts
CGTalk Forum Leader
 
Join Date: Sep 2003
Posts: 1,066,481
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


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 04:26 PM.


Powered by vBulletin
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.