This time, with radiosity.
I am still not entirely satisfied with the scene. I think it is too bright,
with too little contrast. I am sure how to improve this, so, any comments
are more than welcome.
I used the following settings:

global_settings {
  #if (Radiosity)
  radiosity {
    pretrace_start 0.08           // start pretrace at this size
    pretrace_end   0.02           // end pretrace at this size
    count 35                      // higher -> higher quality (1..1600) [35]
    nearest_count 5               // higher -> higher quality (1..10) [5]
    error_bound 0.2               // higher -> smoother, less accurate [1.8]
    recursion_limit 1             // how much interreflections are
calculated (1..5+) [3]
    low_error_factor .3           // reduce error_bound during last pretrace
step
    gray_threshold 0.0            // increase for weakening colors (0..1)
[0]
    minimum_reuse 0.015           // reuse of old radiosity samples [0.015]
    brightness 0.5                  // brightness of radiosity effects
(0..1) [1]
    adc_bailout 0.01/2
    normal on                   // take surface normals into account [off]
    media off                    // take media into account [off]
    always_sample off           // turn sampling in final trace off [on]
    //max_sample 1.0              // maximum brightness of samples
  }
  #end
  noise_generator 2
  assumed_gamma 1.0
}
light_source {<-(SkyScale*0.7),SkyScale*0.7,-(SkyScale*0.7)> colour rgb
<1,1,0.8>*1.5}


Thomas

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