[Bf-cycles] (un)Premultiplyed render passes

[Adriano Oliveira]

Got it!
Thank you.


Adriano A. Oliveira


2014-02-28 11:23 GMT-03:00 Brecht Van Lommel <brechtvanlommel at pandora.be>:

> If you combine the passes as shown in the graph there will be no halo, the
> output will already be premultiplied.
>
> You would then use the Set Alpha node to give it an alpha channel. (I'm
> not sure if that is what you mean by "applying" the alpha channel, you
> should not be multiplying it in anyway, only setting it).
>
> Also, black halos are a sign that you have premultiplied when you
> shouldn't, it's white halos that you see when you forget to premultiply.
>
> On Feb 28, 2014 1:10 PM, "Adriano Oliveira" <adriano.ufrb at gmail.com>
> wrote:
> >
> > But as long as color passes are not premultyplied, you will get a black
> halo when applyig alpha to the final image, don't you?
> >
> >
> > Adriano A. Oliveira
> >
> > Livro: http://goo.gl/WtcNX
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> >
> >
> > 2014-02-28 1:14 GMT-03:00 Daniel Salazar - patazstudio.com <
> zanqdo at gmail.com>:
> >
> >> Hi, this is no bug, here's the correct way to recompose the passes
> >>
> >>
> http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Passes#Combining
> >> Daniel Salazar
> >> patazstudio.com
> >>
> >>
> >> On Thu, Feb 27, 2014 at 9:41 PM, Adriano Oliveira
> >> <adriano.ufrb at gmail.com> wrote:
> >> > BUILD: b5d6f14
> >> >
> >> > I don't know if this is a bug or not, but I am rendering dufuse and
> glossy
> >> > passes (direct, indirect, color) and I have noticed that some are
> >> > premultiplied (likre indirect) and others are not (like color).
> >> >
> >> > This seams to be inconsistent.
> >> >
> >> > Adriano A. Oliveira
> >> >
> >> > _______________________________________________
> >> > Bf-cycles mailing list
> >> > Bf-cycles at blender.org
> >> > http://lists.blender.org/mailman/listinfo/bf-cycles
> >> >
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> >
> >
> >
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> >
>
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