Thank you all for the encouraging words!

There is some help I would like to have with radiosity: I post the same 
scene with and without R. What causes the change in colour and why does 
the +R image look so flat? 
Settings: 

<code begin>
global_settings
  { 
  assumed_gamma 2.2 
  ambient_light color rgb .25
      ini_option "+QR"
      radiosity {
        pretrace_start  1/16
        pretrace_end    1/128
        count          35
        nearest_count   5   
        error_bound     1.8 
        recursion_limit 3
        low_error_factor .5
        gray_threshold  0.0
        minimum_reuse   0.015
        brightness      1
        adc_bailout     0.01/2
        normal on
      }
  }
<code end>

Just a low-quality R to start with.
Is it the assumed_gamma? or the ambient_light?
-- 
Regards,  Sander

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