> sphere{0 1 pigment{color rgb 0.2} translate<1,2,3>}
> sphere {1 1 pigment{color rgb 0.4} translate<1,2,3>}
> sphere {2 1 pigment{color rgb 0.6} translate<1,2,3>}
> 
> becomes
> 
> #macro M(c)pigment{color rgb c}translate<1,2,3>#end
> sphere{0 1 M(.2)}
> sphere{1 1 M(.4)}
> sphere{2 1 M(.6)}
> 
> ;-)
> Paolo
> 
> 
yet better

#macro  M(l,r,c)sphere{l r pigment{color rgb c}translate<1,2,3>}#end

this saves you two spheres :-)

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