There's a little bug in povray for windows (at least in 3.1a and 3.1d):

  For example, render a scene with max_trace_level 7. After rendering, one
line of the messages window says something like this:

Rays:             40317   Saved:                 0   Max Level: 7/7

  Now change to max_trace_level 5. After rendering, the same line will say:

Rays:             40317   Saved:                 0   Max Level: 7/5

  Obviously it should say 5/5, not 7/5.
  If you restart povray and render the same scene, the line says, correctly:

Rays:             40317   Saved:                 0   Max Level: 5/5

  The max level value will always change to higher but never to lower values
until you restart povray.

  This little bug will probably not annoy most of people, but if you are
watching that value to search for good max_trace_values while changing the
scene, you will get wrong results.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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