Here's the source for a box with no lights.  Originally made in
Moray, but then modified in POV.  If you uncomment the light source
and set the material for the ceiling back to DullWhite, you'll get a
more traditionally lit radiosity scene.

-Nathan Kopp

------------------------------------------------------------------
//  Persistance of Vision Raytracer V3.1
//  World definition file.
//
//  Contains 1 lights, 4 textures and 8 primitives.
//
//  This file was generated for POV-Ray V3.1 by
//  Moray V3.1 For Windows (c) 1991-1998 Lutz + Kretzschmar
//

//  Date : 01/21/1999    (21.01.1999)
//

/*
  The text between these two comments is in MorayPOV.INC and is
  automatically included in all POV files that Moray exports.
*/

default {
  texture {
    pigment { rgb <1,0,0> }
    finish { diffuse 0.4 ambient 0.3 specular 0.6 roughness 0.001 }
  }
}

/* // Scene Comment

This scene was created with Moray For Windows.

*/ // End Scene Comment

global_settings {
  adc_bailout 0.003922
  assumed_gamma 1.9
  hf_gray_16 off
  irid_wavelength <0.247059,0.176471,0.137255>
  max_intersections 64
  max_trace_level 4
  number_of_waves 10
  ambient_light 1.5
  
  radiosity {
    brightness       3.3
    count            100
    distance_maximum 0
    error_bound      0.33
    gray_threshold   0.2
    low_error_factor 0.8
    minimum_reuse    0.015
    nearest_count    6
    recursion_limit  3
  }
}

background { color <0.000,0.000,0.000> }

camera {  //  Camera StdCam
  location  <      0.000,     -11.000,       6.000>
  direction <        0.0,         0.0,      0.9786> // Aperture is 0.94 degrees
  sky       <    0.00000,     0.00000,     1.00000> // Use right handed-system 
  up        <        0.0,         0.0,         1.0> // Where Z is up
  right     <    1.33333,         0.0,         0.0> // Aspect ratio
  look_at   <      0.000,       0.000,       5.000>
}

//
// *******  L I G H T S *******
//

/*
light_source {   // Light1
  <0.000, 0.000, 9.000>
  color rgb <1.000, 1.000, 1.000>
  fade_distance  3.0
  fade_power 2.0
}
*/

//
// ********  TEXTURES  *******
//

#declare DullWhite = 
   material  // DullWhite
   {   
      texture
      {      
         pigment
         {
            color rgb <1.0, 1.0, 1.0>
         }      
         finish
         {
            ambient 0.1
            diffuse .9
         }
      }
   }


//  $MRY$: 'DullRed'


#declare DullRed = 
   material  // DullRed
   {   
      texture
      {      
         pigment
         {
            color rgb <1.0, 0.125, 0.229167>
         }      
         finish
         {
            ambient 0.1
            diffuse .9
         }
      }
   }


//  $MRY$: 'DullGreen'


#declare DullGreen = 
   material  // DullGreen
   {   
      texture
      {      
         pigment
         {
            color rgb <0.166667, 0.906233, 0.1354>
         }      
         finish
         {
            ambient 0.1
            diffuse .9
         }
      }
   }


//  $MRY$: 'ShinyWhite'


#declare ShinyWhite = 
   material  // ShinyWhite
   {   
      texture
      {      
         pigment
         {
            color rgb <1.0, 1.0, 1.0>
         }      
         finish
         {
            ambient 0.1
            phong 0.1223
            phong_size 72.846667
            reflection 0.266167
         }
      }
   }


//
// ********  REFERENCED OBJECTS  *******
//



//
// ********  OBJECTS  *******
//

difference{
  box { <-1, -1, -1>, <1, 1, 1>}
  box { <.8,-.5,-.5>,<1.1,.5,.5>}
  box { <.7,-.3,-.3>,<1.1,.3,.3>}
  box { <.6,-.2,-.2>,<1.1,.2,.2>}
  material {
    DullWhite
  }
  scale 1.5
  rotate -45.0*z
  translate  <-2.0, 0.0, 1.5>
}


sphere { // Sphere001
  <0,0,0>,1
  material {
    ShinyWhite
    //DullWhite
  }
  scale 2.0
  translate  <2.0, 1.0, 2.0>
}


box { // Floor
  <-1, -1, -1>, <1, 1, 1>
  material {
    DullWhite
  }
  scale <5.0, 5.0, 0.1>
}




box { // LtWall
  <-1, -1, -1>, <1, 1, 1>
  material {
    DullGreen
  }
  scale <0.1, 5.0, 5.0>
  translate  <-5.0, 0.0, 5.0>
}


box { // RtWall
  <-1, -1, -1>, <1, 1, 1>
  material {
    DullRed
  }
  scale <0.1, 5.0, 5.0>
  translate  <5.0, 0.0, 5.0>
}


box { // BackWall
  <-1, -1, -1>, <1, 1, 1>
  material {
    DullWhite
  }
  scale <5.0, 0.1, 5.0>
  translate  <0.0, 5.0, 5.0>
}


box { // Ceiling
  <-1, -1, -1>, <1, 1, 1>
  material {
    //DullWhite
    texture{pigment{rgb<1,1,1>} finish{ambient 10}}
  }
  scale <5.0, 5.0, 0.1>
  translate  10.0*z
}

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