Cousin Ricky <ric### [at] yahoocom> wrote:
> The documentation reads, "The sky sphere can contain several pigment
> layers..." But if I use more than one transparent pigment on a
> sky_sphere, the transparent areas show black instead of the first
> pigment layer.
>
> In all three images, a blue gradient is used as the first pigment layer.
>   In cases 1 and 2, one partially transparent pigment is layered over
> the blue gradient, and the result is as I expect.  In the third case, 2
> partially transparent pigments are layered over the blue gradient, and
> the blue does not show at all.
>
> The render stats indicate that only one trace level is used.
>
> As a sanity check, I applied the same pigments to a sphere at the lower
> left.  In all cases, the sphere renders as I expect.
>
> Am I missing something, or is this a bug?

> The results are the same in POV-Ray versions 3.6.1, 3.7, and
> 3.7.1-alpha.8150025.




I can confirm this for 3.6.2, but not for 3.7.0msvc10.win64.

Here it renders correct down to max_trace_level 1.


Norbert

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