[Bf-committers] Zcombine node + alpha channel issue

[Cédric PAILLE]

Hi,

Can I hope that this feature will be re-implemented?
Is there a reason to this behaviour?

Cheers.

2008/4/14, GSR <gsr.b3d at infernal-iceberg.com>:
>
> Hi,
> cedricpaille at gmail.com (2008-04-14 at 1142.59 +0200):
>
> > I was playing with this node, add saw that the alpha channel for each
> images
> > was not taken into account.
> > I use an external renderer (Pixie) with my Blender rib exporter and
> export Z
> > and A channels and when I motion blur, the result is not what I expected
> > (only Z do the mask).
>
>
> There was a patch about that, in which zcombine used alpha over ops
> based in which thing was over what. I can look it up, it must be
> somewhere.
>
>
> > I made this tweak to CMP_zcombine.c to make it work:
>
> [Something like looks like alpha over op, but coded by hand ;] ]
>
> > But It works only when "Save Buffers" and "Full Sample" is enabled on
> the
> > "output" render panel.
> > The other case seems a bit harder to code (with the current
> implementation).
>
>
> The patch had special handling for antiaaliased / crossing surfaces,
> so it worked acceptably well, and before full sample was implemented.
> It was rejected.
>
> GSR
>
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-- 
Cedric PAILLE.
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