:   #declare Image=image_map{...}

  Perhaps the closest thing currently (besides making it just a pigment)
would be making it a pigment function. The advantage of this is over declaring
a pigment is that you can use the function anywhere:

#declare Image = function { pigment { image_map { ... } } }
...
  pigment { function { Image(x,y,z) } }
  normal { function { Image(x,y,z) } }
  interior { media { density { function { Image(x,y,z) } } } }
...

-- 
#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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