Re: Alpha channel with transparent objects 2004-02-20 - By David Bell
Back
Cool
The way I would generate a mask for the window would be to make a
separate rendering pass with no lights, and the window material set to
bright white in the glow channel.
I use Carrara and AfterEffects regularly with this technique. I have
also used the DVMattePro plugin to create the matte - I do this if
there are reflections from the Carrara scene that I want to preserve.
I hope this helps.
Yours,
David
On Friday, February 20, 2004, at 12:31 PM, Ron Franks wrote:
> I do this regularly in Plasma and Max at work. I render out objects
> with windows like cars and planes and composite them in Photoshop or
> Flash, depending what I need to do. The underlying image shows
> through the glass via the alpla mask, which I use to select the image
> and place in a trasparent layer.
>
> Currently I've made a ship's porthole, and I wanted to use it in a
> composition that includes redenders from Vue d'Esprit that show
> through the glass. Looks like I'll have to fake it in Photoshop if I
> use Carrara.
>
> --- In Carrara@(protected), "Ron Franks" <rondfranks@(protected)> wrote:
> > I don't know if my shaders are not applyed correctly, but objects
> > with transparent shaders like glass do not affect the alpha channel
> > in Carrara 3.0.3. The channel is masking outside of objects, but
> not
> > to any degree through objects with any amount of transparency.
> >
> > Seems like it should work that way. Any info is appreciated.
>
>
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David Bell
nordwind53@(protected)
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