problem with transparency/alpha channel 2004-04-25 - By David Bell
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Dexter,
The way I have solved this in the past is to create an additional pass
to create a luma mask that I can then use to punch a hole in what needs
to be transparent. It does mean making a copy of your .car file and
retexturing, and it does work like a charm.
roughly
copy .car file
turn off all illumination (lights, sun, ambient --- don't forget the
ambient)
texture all opaque elements with a white in the glow channel, nothing
in all others
texture transparent elements with black in glow channel
re run your animation
and you will have a mask
Hope this helps.
Yours,
David
David Bell
nordwind53@(protected)
(long time east coast member of the Pixel Corps)
On Apr 25, 2004, at 4:57 AM, Dexter Ward wrote:
> I put a company logo on a cylinder and rendered a movie with alpha
> channel on, to get the
> logo spinning. But if I superimpose the resulting movie over another
> movie in a
> compositing program, the cylinder is there, it seems the alpha channel
> doesn't count the
> transparency channel in the shader. Is there a way to fix it?
> Sorry for my poor english, hope you understand the problem
> Dexter
>
>
>
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