"Alf Peake" <alf### [at] peake42freeservecouk> wrote in 
news:3ddfc840@news.povray.org

[...]

Mine idea was to used layer texture - top gives only specular (and is 
blue), lower gives only diffuse (and it's dark-gray / black)

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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