I have been using the pov 3.1 for about 3 or 4 days and I have a
question about a black sphere that appears on the ceiling in a enclosed
space I have created.
I used the lightbulb declare (slightly modified) from the tutorials to
create a lightning sphere and it seems to have created a shadowed image
of the sphere on the ceiling

#include "colors.inc"
#include "textures.inc"


camera {
   location <0, 40, -150>
   look_at  <0, 35, 0>

   }

#declare Lightening_Sphere =
      sphere { <0, 35, 0>, 10

   }


light_source { <0, 35, 0>
       color Plum
       looks_like { Lightening_Sphere }
       }


union {
box { <-75, -3, 75>
      <75, 0, -75>

   }

box { <-75, 0, 75>
      <75, 75, 73>

   }

box { <-75, 0, -75>
      <-73, 75, 75>

   }

box { <75, 0, 75>
      <73, 75, -75>

   }

box { <-75, 75, 75>
      <75, 73, -75>

   }

texture { Aluminum }


   }



sphere { <0, 30, 0>, 10
    texture { Lightening2
    scale 20 }
   }



It is a simple room of aluminum with a reflecting sphere of lightening
but I cannot figure out where the shadow sphere came from.
  My question is this...

Does the light source not show a 360 degree arc.  I believe that it does
and my experience with Lightwave and Studio Max leads me to believe that
it should so where is the shadow sphere coming from?

Thanks for any help on this subject.

A note for the editors--

    THIS IS A GREAT PROGRAM!!!

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