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Classic Color Burn

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Steven Kutny
Classic Color Burn
on Sep 7, 2010 at 7:45:27 pm

Hello,

I'm trying to find out if anybody knows the math behind the "Classic Color Burn" transfer mode in After Effects? Another Artist is building my comp inside Flame but this mode doesn't exist in that software so we're getting a very different result. Any thoughts?

Thanks,

Steve

Steven Kutny
Digital Artist
http://www.stevenkutny.com


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Dave LaRonde
Re: Classic Color Burn
on Sep 7, 2010 at 7:59:11 pm

According to AE's online Help, Classic Color Burn is simply the same thing as Color Burn as found in AE 5 and earlier. Check it out:

http://help.adobe.com/en_US/aftereffects/cs/using/WSFB0FE760-71F3-4616-AE88...

On this page, there's a link to what's supposed to be precisely what you want.... but it isn't. I'm going to bring that to Adobe's attention.

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


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Steven Kutny
Re: Classic Color Burn
on Sep 7, 2010 at 8:11:17 pm

Thanks David,

I read this earlier and found it interesting. By definition, it seems that this is just a random legacy thing that Adobe decided to keep all these years. If they could give us a way to recreate the effect inside Photoshop, I'm sure I could figure out a flame translation. Thanks for the response.

Steven Kutny
Digital Artist
http://www.stevenkutny.com


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Dave LaRonde
Re: Classic Color Burn
on Sep 7, 2010 at 8:13:48 pm

Hey, stay tuned to this thread: I bet the answer shows up pretty soon.

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


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Dave LaRonde
...and here's the answer!
on Sep 7, 2010 at 8:58:14 pm

You're gonna LOVE this one...

The details about all the blending modes ARE INDEED in the link I thought was incorrect. Here it is:
http://www.adobe.com/devnet/pdf/pdf_reference.html

But boy, do you have to dig to find it! According to Todd Kopriva at Adobe, you need to know this, too:
"The blending modes are specified in section 7.2.4 of version 1.7 of the PDF reference."

Look long and hard at that quote. Write it down. Don't lose it or you're sunk.

Would YOU have known to dig that deeply into a seemingly-incorrect link?
Would YOU have taken the time to pore over arcane documentation to find the perals of wisdom buried deep within?
Me neither.

Would you have appreciated a more direct and AE-specific answer to your legitimate issue?
Or at least an explanation of why a seemingly incorrect link is there at all?
Me, too.

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


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Dave LaRonde
Re: ...and here's the answer!
on Sep 7, 2010 at 10:01:49 pm

As it turns out, the section reference was there, too.... just at the very bottom of the page. Sorry 'bout that, Todd. Here I am ragging on Adobe for no really good reason.

So if you use AE's Online Help, don't forget to double-check at the bottom of any given page to see if anything's been changed. Yeah, it's cumbersome, but that's the price you pay for having a continuously-updated document.

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


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Chris Wright
Re: Classic Color Burn
on Sep 7, 2010 at 8:57:00 pm

The 2006 color burn = classic color burn math model
http://www.adobe.com/devnet/pdf/pdfs/blend_modes.pdf

http://technicolorsoftware.hostzi.com/


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Chris Wright
Re: Classic Color Burn
on Sep 7, 2010 at 10:29:32 pm

hmm I'm a little stumped, the formulas are the same. I'll get back to you, I believe you have to go back farther into an older reference. I'll see if the formula changes


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Steven Kutny
Re: Classic Color Burn
on Sep 7, 2010 at 10:52:45 pm

Wow! Thanks for all the input guys. I'm pretty sure that this is one of the most confusing things I've ever tried to find in Adobe documentation! I'm still trying to figure this out. I don't see a "7.2.4" in any of the 3 current downloadable documents from the Adobe site. Chris, thanks for your link but is this version 1.7? It's dated from 2006 and doesn't seem to cover the "classic color burn."

Steven Kutny
Digital Artist
http://www.stevenkutny.com


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Chris Wright
Re: Classic Color Burn
on Sep 7, 2010 at 11:12:00 pm

I'm as confused as you are. All the documentation to classic color burn has been deleted. I checked every reference and even going all the way back to 1.3, the stuff is gone.
But if you are smart with math, you can derive the classic burn by

"color burn retains the shadow whereas the shadows disappear with classic color burn." so the formula is almost exactly the same, just the blacks get ignored.

7.2 is the chapter in the index pdf btw

http://technicolorsoftware.hostzi.com/


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