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References: <list-4837685@media-motion.tv>
Date: Thu, 6 Sep 2012 14:48:18 -0400
Message-ID: <CAGT+MC3yaR1mWvebHXaGxtng2n4YY19aDeBiMGv2nFpf9B9vWA@mail.gmail.com>
Subject: Re: [AE] "conditional" blending layers
From: Zack Lovatt <zack@zacklovatt.com>
To: After Effects Mail List <AE-List@media-motion.tv>
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This is messy, but:

- create a precomp for each non-normal blend combination (so, B-over-A in
which A is added, A-over-C in which A is overlayed, etc)
- create a precomp for each overlap scenario, with black and white to
create mattes
- in your master comp, using multiple instances of the calculations effect
and your mattes have each circle get knocked out wherever there is an
overlap
- in your master comp, bring in the overlap precomps and only have them in
where the mattes dictate

I think this makes sense. Not at a computer at the moment, but let me know
if this needs clarification.

This is where a node-based compositing package would really come in handy!

Zack
On Sep 6, 2012 2:29 PM, "Teddy Gage" <teddygage@gmail.com> wrote:

> How would I go about creating a "conditional" blending layer? What I mean
> is it possible to have say five circles called A,B,C,D,E randomly floating
> in space and overlapping, such that unless A is over B, A has "normal"
> blending mode, but when A overlaps B, it has an "add" blending mode? And
> then when A overlaps C it has multiply blending mode instead, just as an
> example? This is a puzzle...
>
> --
> Animator & Editor
> www.teddygage.com
> Brooklyn
>
>

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<p>This is messy, but:</p>
<p>- create a precomp for each non-normal blend combination (so, B-over-A i=
n which A is added, A-over-C in which A is overlayed, etc)<br>
- create a precomp for each overlap scenario, with black and white to creat=
e mattes<br>
- in your master comp, using multiple instances of the calculations effect =
and your mattes have each circle get knocked out wherever there is an overl=
ap<br>
- in your master comp, bring in the overlap precomps and only have them in =
where the mattes dictate</p>
<p>I think this makes sense. Not at a computer at the moment, but let me kn=
ow if this needs clarification.</p>
<p>This is where a node-based compositing package would really come in hand=
y!<br></p>
<p>Zack</p>
<div class=3D"gmail_quote">On Sep 6, 2012 2:29 PM, &quot;Teddy Gage&quot; &=
lt;<a href=3D"mailto:teddygage@gmail.com">teddygage@gmail.com</a>&gt; wrote=
:<br type=3D"attribution"><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
How would I go about creating a &quot;conditional&quot; blending layer? Wha=
t I mean is it possible to have say five circles called A,B,C,D,E randomly =
floating in space and overlapping, such that unless A is over B, A has &quo=
t;normal&quot; blending mode, but when A overlaps B, it has an &quot;add&qu=
ot; blending mode? And then when A overlaps C it has multiply blending mode=
 instead, just as an example? This is a puzzle...<br clear=3D"all">


<br>-- <br><span style>Animator &amp; Editor</span><br style><span style><a=
 href=3D"http://www.teddygage.com" target=3D"_blank">www.teddygage.com</a><=
/span><br style>

<span style>Brooklyn</span><br><br>
</blockquote></div>

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