Bill Pragnell wrote:
Very cool.

On a vaguely related note, I onetime wrote something to produce tiled 
"Mosiacs" (or even patio stones) in circular bands. What drove the idea 
was to use eval_pigment() to have the mosaic pieces reproduce an 
underlying image. I was using fixed sized square tiles.  It involved 
calculating the number of tiles necessary at each circumference.  If 
there was a "reminder" it was averaged among the grouts between all the 
tiles.  But for the innermost rings, the pinched looking grouts did not 
seem realistic so I produced angular tiles like in your arches for inner 
rings. But I could never decide what a real mosaic would do.  It would 
seem unlikely that tiles would be cut at the slight angles necessary on 
the outer rings.  I couldn't decide about the inner rings. What I could 
never solve, also, was any sort of central "plug" arrangement other than 
having a large circular tile.  Wondering if you have ever approached 
this problem?

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