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> Ok, the error was caused by a typo in defining R1, but now when the script runs,
> there's no object visible.
>
> I'm assuming I'll have to play with the following values, but I find it starnge
> that I get NOTHING.
>
> contained_by { sphere{0, 2} }
> max_gradient 5
>
> Not a dark spot, just... nothing.
>
>
Look at the messages after the render. Does it say anything about
max_gradient?
As one of the functions contain pow((v/pi), 100), the effective
max_gradient may be rather large. Try using max_gradient 100 or more.
Did you actualy /place/ your Apple object?
Add:
object{Apple pigment{rgb<1,0,0>}}
To your scene.
Alain
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