Particle alpha woes 2005-05-16 - By Scott McGinley
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Eric,
I'm really digging your epiphany. That certainly can
be very useful in many different situations. I know
that I will start using it right away.
Scott
--- Eric Lampi <ericlampi@(protected)> wrote:
> Hey Dr. Jones!
>
> It's a problem, we've had this happen before haven't
> we? *cough* Sky Captain*cough* :).
>
> I had some epiphanies lately and I was working on a
> some tutorials, one of them addresses some of those
> issues you're having, so rather than make you wait,
> take a look at the enclosed scene.
>
> It allows you to override and make RGB Chroma mattes
> on a per emitter basis as opposed to per ptype.
>
> I am using Colormap to drive the color from the
> emitter using a small image tiles of 100% Red,
> Green,
> or Blue.
>
> If you open the FXtree, you'll see I have the images
> piped into a colorpaste node. You can use whatever
> you'd like, color correct, tint etc... The point is
> you can control the color output via the FXTree.
> Turn
> some red, some blue, black even if you want
> occlusion.
>
> I don't think it's hard to imagine how you could use
> that for a lot of other FX too. The best thing
> about
> it is that you don't have to manage a truckload of
> Ptypes that basically have the same behavior, but
> need
> to be separated out somehow.
>
> I have an override on the emitters colormap
> checkbox,
> so that you can have a beauty pass and RGB matte
> pass.
> The only drawback to this is you would need to
> resimulate to get the color to change. I am sure
> you
> can write a brilliant little script that would
> rename
> and resimulate for each pass and reference those PTP
> files during render.
>
> Anyway, I hope it helps.
>
> Eric
>
> Freelance 3-D Animator, F/X Artist, Particle Man
> ATTACHMENT part 2 application/x-zip-compressed name=paticle-Test.zip
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