Op 13-4-2021 om 23:31 schreef Bald Eagle:
> "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
> 

So, to be correct, I should also change all the single 0.000 components 
of colour triplets to 0.004.

I remember in the past to have avoided 0.0 in pigment triplets, only to 
forget about it subsequently of course. :-)

-- 
Thomas

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