I found some code which gives an annoying (and false) warning about lack of
pigment.  It happened when I was unioning a whole bunch of blobs together.


//// here it is //
union{
        #declare toothblob=blob{threshold 0.7 cylinder{0,y,1,1 pigment{rgb
1}} }

        object{toothblob translate <0,1,0> }
        object{toothblob translate <0,2,0> }
        object{toothblob translate <0,3,0> }
        object{toothblob translate <0,4,0> }

 // pigment{rgbft 1}   //but this line uncommented out fixes it??
}

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