Rob Richards wrote:
> Doh!
> 
> I should have checked the release notes! latest beta has gamma
> correction on by default. That was the reason
> 
> Cheers
> Rob
> 

the docs need to be updated to reflect this, I think:
http://www.povray.org/documentation/view/3.6.1/260/

Yet clearly in my scenes the Display_Gamma has an effect.

Display_Gamma=2.2 : scene renders bright
Display_Gamma=1.0 : scene renders darker (like 3.6 without assumed_gamma)
Display_Gamma=0.45: scene renders quite dark


"For scene files that do not contain an assumed_gamma global setting the INI file
option Display_Gamma will not have any affect on the preview output of POV-Ray or for
most output file formats. However, the Display_Gamma value is used when creating PNG
format output files, and also when rendering the POV-Ray example files (because they
have an assumed_gamma), so it should still be correctly set for your system to ensure
proper results. "

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