"Ken" <tyl### [at] pacbellnet> wrote in message
news:3AAEDE69.DF5EB5B0@pacbell.net...
>
> It's not a shadow. What kind of object was used to create the wall ?

It's supposed to be a curved wall.  Full source file is at
http://green.dlugosz.com/files/lamp1.3.pov .

That object is:

difference {
   intersection {
      cylinder { <0,0,0>, <0,18,0>, 12 }
      plane { -z, 0 }
   } // end of intersection
   cylinder { <0,0,0>, <0,18,0>, 11.5 }
   pigment { color red 0.858824 green 0.439216 blue 0.576471 }
   finish {
      ambient 0.15
      diffuse 0.6
      specular 0.6
   }
   scale <1.6,1,1>
} // end difference

Thanks for the insight,
--John

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