"Bald Eagle" <cre### [at] netscapenet> wrote:
> "Kenneth" <kdw### [at] gmailcom> wrote:
>
> > Or perhaps I'm misunderstanding what the ShaderToy reference means, and why it
> > cautions against a 0.0 value in a color vector being multiplied.

For instance:

"Pigments having any zero color components currently doesn't play nice with
SSLT. For example use rgb <1,0.01,0.01> instead of rgb <1,0,0> as color literals
or when declaring pigment identifiers."

https://wiki.povray.org/content/Reference:Finish#Subsurface_Light_Transport

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