On 09/13/2016 12:01 PM, William F Pokorny wrote:
>
> Forget the filter/transmit getting turned on - though I think there is
> still something off about the shadows with it on.
>
> Wonder if that is unrelated to the potential pattern.
>

Interesting. The effect is unrelated.

When the plane's pigment is set to color rgbft <1,1,1,1,1> and the 
background is set to anything but black, an odd inverted shadow shows up 
on the transparent plane. Could be used for special effects I guess.

Does make me wonder if "color 1" should be promoted as it apparently is 
in the posted code?

Bill P.

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