: I found it within function chapter. I agree it should be mentioned at
: heigh_field chapter too. However it creates new instance of images by
: reevaluating it.

  On the other hand, it does so only during the creation of the heightfield.
I suppose that this temporary image is freed after the heightfield has been
created (or if it isn't, then I think that it definitely should be).

-- 
#macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
],13),8)-3,10>#end blob{N(array[6]{11117333955,
7382340,3358,3900569407,970,4254934330},0)}//                     - Warp -

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