I get very odd results with the parameters that follow.  Am i doing something
wrong?

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#include "shapes.inc"

#declare R1 = 0.05;
#declare R2 = 0.25;

#declare Test1 = Supercone (0, R1, R1, y, R1, R2)

#declare Test2 = difference
{  box { <0, -0.1, 0>, <R1, 0.9, 0.5> }
   object { Test1 }
}

union
{  object { Test1 translate <-0.5, -0.5, 0> }
   object { Test2 translate <0.5, -0.5, 0> }
   pigment { rgb y }
   finish { specular 0.2 }
}

global_settings { assumed_gamma 1 }

camera
{  look_at 0
   location <-3, 2, -5>
   angle 15
}

light_source { <-2, 3, -1> * 10000, rgb 1 }

plane { y, -1 pigment { checker rgb 0.5 rgb 1 } }

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