In another thread there was a discussion about whether a higher recursion
level would make the image look better in the "illuminating hemisphere"
scene. It was also questioned, whether it is possible to speed up the
radiosity calculations using the aid of area lights without changing too
much the resulting image.

  Well, I decided to try.

  The first image uses radiosity recursion level 1.
  The second image is the exact same scene file, with the only difference
being the recursion level changed to 2.

  The second image took about 1 hour and 5 minutes to render. I tried to
help the radiosity with area lights, so I created a hemicube of light
using 5 area lights and then reduced the radiosity quality settings to
speed it up.
  The resulting image is the third one. It took about 40 minutes to render.

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