POV-Ray : Newsgroups : povray.binaries.images : Gamma issues again : Re: Gamma issues again Server Time
15 May 2024 00:15:47 EDT (-0400)
  Re: Gamma issues again  
From: Cousin Ricky
Date: 28 Dec 2015 09:15:01
Message: <web.5681435461c3ffe8566b73360@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:
> - POV-Ray 3.6 was the first version of POV-Ray to ever tackle the issue
> of gamma, by introducing the "assumed_gamma" keyword and the
> "File_Gamma" (or was it "Display_Gamma"?) ini file setting.

The assumed_gamma keyword was present in POV-Ray 3.5, and it was Display_Gamma.

> Except for the problems that Warp still saw. His annoying feedback had
> already inspired a good deal of the gamma improvements. Now he argued
> that "assumed_gamma 1.0" couldn't be right because gradients would look
> crappy.

Warp's stubbornness has already inspired an update to AndroidRobot in the Object
Collection, and inspired gamma awareness in two upcoming modules that I haven't
released yet.  (But he is still wrong.)

P.S.  To my eyes, the hue gradients look best around gamma 1.5 or 1.6.  (I no
longer trust my eyes enough to say which gammas are best for chroma and
lightness.  I thank Thomas de Groot for jolting me into the realization that my
lying eyes should not be trusted.)


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.