This one is an image made with an old version of pov-ray.

The pigment is very simple.
pigment {
  checker
    color 1
    color 2
    color 3
    ...
}

How could be made TODAY this effect avoiding error messages?

Thanks!

pd. Render time
with pov-ray 2.0 -not FTPov- (msdos version) 38 secs)
with pov-ray 3.6  (windows version) 34 secs

--
light_source{0,1}#macro C(r,p)cylinder{x*-2,x*2,.9 pigment { rgb
p} /* B Gimeno estoeslarealidad */ rotate p*90 } #end difference
{box {-1,1} C(z /* http://usuarios.lycos.es/game2413 */,x)C(x,y)
C(z,z) pigment{rgb 2} rotate 45 translate z*4} // www.povray.org

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