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07-01-2012, 08:38 PM   #1
NextDesign
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You're doing it wrong; Common A/O Problems
Some very interesting things in this article; may of which I didn't know about. Thought it might help some people out.

http://mentalraytips.blogspot.com/20...-ambience.html

Most importantly: http://www.lysator.liu.se/~zap/pd/ao-explain.jpg
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Last edited by NextDesign; 07-01-2012 at 09:22 PM.
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07-01-2012, 09:49 PM   #2
stwert
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Interesting... I skimmed the article, but checked out the image. I can understand why the first is wrong, (using a multiply blend mode with occ and direct light). But how in PS would you achieve the addition operation?

I just bought Jeremy Birn's lighting book, so hopefully I'll get a good foundation in lighting and rendering soon.
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07-01-2012, 10:01 PM   #3
Jay
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Thanks for this John

I have always complained about the overuse of AO in film and tv. People forget about spec and main key lights all the time.....nice for the peeps here to have a good read

Jay
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09-02-2012, 12:03 AM   #4
bullet1968
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Ok that has me confused...Im with stwert...in the tuts I have for import intno PS the AO is multiplied John??? is this math mean to be for PS as well??

cheers bullet
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09-02-2012, 02:25 AM   #5
ctbram
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Thanks john that was a good read. I added a link to my cheater notes.
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