Simple Scene - 5 colored reflective balls, light source, black sky,
reflective plane, But there is an un-wanted arc in the lower left corner.
I have tried moving the light source far away (900x900x900)
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// Persistence of Vision Ray Tracer Scene Description File
// File: r-pentomino.pov
// Vers: 3.6
// Desc: Checkered Floor Example
// Date: 02/25/2007
// Auth: Ron Hudson
//

#version 3.6;

#include "colors.inc"

global_settings {
  assumed_gamma 1.0
  max_trace_level 5
}

// ----------------------------------------

camera {
  location  <0.0, 8.0, -15.0>
  direction 1.5*z
  right     x*image_width/image_height
  look_at   <0.0, 0.0,  0.0>
}



// Create an infinite sphere around scene and allow any pigment on it
sky_sphere
{
        pigment
        {
                color Black
        }
}



light_source {
  <0, 0, 0>            // light's position (translated below)
  color rgb <1, 1, 1>  // light's color
  translate <-900, 900, -900>
}


// ----------------------------------------


plane {               // Reflective Black floor
  y, 0
  texture
  {
    pigment {
      color Black
    }
    finish{
      diffuse 0.3
      ambient 0.0
      specular 0.6
      reflection {
        0.8
        metallic
      }
      conserve_energy
    }
  }
}


sphere {              // reflective sphere
  <0,1,0>, 1
  texture {
    pigment {
      color Light_Purple
    }
    finish{
      diffuse 0.3
      ambient 0.0
      specular 0.6
      reflection {
        0.8
        metallic
      }
      conserve_energy
    }
  }
}





sphere {              // reflective sphere
  <0,1,3>, 1
  texture {
    pigment {
      color Red
    }
    finish{
      diffuse 0.3
      ambient 0.0
      specular 0.6
      reflection {
        0.8
        metallic
      }
      conserve_energy
    }
  }
}


sphere {              // reflective sphere
  <3,1,3>, 1
  texture {
    pigment {
      color Green
    }
    finish{
      diffuse 0.3
      ambient 0.0
      specular 0.6
      reflection {
        0.8
        metallic
      }
      conserve_energy
    }
  }
}

sphere {              // reflective sphere
  <-3,1,0>, 1
  texture {
    pigment {
      color Blue
    }
    finish{
      diffuse 0.3
      ambient 0.0
      specular 0.6
      reflection {
        0.8
        metallic
      }
      conserve_energy
    }
  }
}


sphere {              // reflective sphere
  <0,1,-3>, 1
  texture {
    pigment {
      color Yellow
    }
    finish{
      diffuse 0.3
      ambient 0.0
      specular 0.6
      reflection {
        0.8
        metallic
      }
      conserve_energy
    }
  }
}

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