an example:
http://usuarios.lycos.es/game2413/domino/xmpdmntower3_1.jpg

--
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

news:43b93de8$1@news.povray.org...
> Hello::
> I've written a macro based on the work of TonyB (who based his work on
Shiro
> Nakayama's labour) to adjust a collection of variations over the pigment
> checker in our scenes of test, instead of the traditional pigment checker
> pattern.  If somebody have in mind some contribution or suggestion that
> could be added to this macro, please does not doubt in commenting it here.
>
> Use:
> pigment { Sn_checkers (num of pattern, pigment1, pigment2)
> where number of pattern corresponds to one of the designs shown in my
> website
> pigment1 and pigment2 are two pigments selected from  "colors.inc" or RGB
> vectors created by the user.
>
> Linkss:
> http://usuarios.lycos.es/game2413/english/checkers.htm < - listed of
designs
> and unloading of SN_Checkers.zip
>
> PS most of my site is in Spanish language, waiting for the translation
into
> English language (sorry for any inconveniences)
>
> --
> 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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