scenes\advanced\mediasky.pov looks much darker with pov3.7beta4
than with pov3.6. I believe that the difference in brightness
probably can't be attributed to gamma problems in this case because
it is so pronounced (but I might be wrong, actually; the scene uses
assumed_gamma 1, and I have noticed that the more the assumed_gamma
differs from the default, the more different pov3.7beta will render
it...)

  By the way, a minor thing and probably not an issue, but at 320x240
(no aa) pov3.6 takes 1m 20s to render while pov3.7beta4 takes 1m 46s.
Is such a slowdown to be expected?

-- 
                                                          - Warp

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