Hi,

I am rendering molecules as a hobby (because I find them very nice).
I already made various renderings using standard lights and I am now trying
radiosity.

I have a simple plane, a molecule over this floor and a sphere for ambient
illumination.
I also have an area light for specular effects.
I am using MegaPov 0.7

I have some little dark spots on the plane I cannot explain.
What is wrong with my parameters ?
The image is not rendered anti-aliased (it takes days to render)

Here is my source code (I removed the molecule because of the size but I can
mail
the entire source code if needed, it's only 9K zipped)

#version unofficial MegaPov 0.7;
declare CameraLocation = < 0, 0, 26.8337451068 > ;

global_settings {
  ini_option "+QR"
  radiosity {
    pretrace_start 0.08
    pretrace_end   0.01
    count 1500

    nearest_count 10
    error_bound 0.02
    recursion_limit 1

    low_error_factor .2
    gray_threshold 0.0
    minimum_reuse 0.015
    brightness 1

    adc_bailout 0.01/2

  }
}

    light_source {
    <0, 0, 80>
    color rgb < 0.3, 0.3, 0.3 >
    area_light <10, 0, 0>, <0, 10, 0>, 11, 11
    adaptive 1
    jitter
  }

camera {
  up < 0, 0, 1 >
  right < 0, 0, 1 >
  angle 35
  translate CameraLocation
  look_at < 0, 0, -1 >
}


// here should be the object (bunch of spheres an cylinders)
// ....

plane {
  z, -3
    texture { pigment { rgb <0.53, 0.63, 0.83> } finish { ambient .0 diffuse
.8 } }
  }

   // the source of ambient lighting
 sphere {
  <0, 0, 0>, 100
      pigment { color rgb <0.8, 0.8, 0.8> }
      finish { ambient 1.0 }
 }

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