POV-Ray : Newsgroups : povray.binaries.images : IRTC WIP : Re: IRTC WIP Server Time
31 Jul 2024 12:17:16 EDT (-0400)
  Re: IRTC WIP  
From: clipka
Date: 14 Apr 2010 05:30:20
Message: <4bc58b2c$1@news.povray.org>
Am 14.04.2010 05:22, schrieb Dave Blandston:

> On my computer:
>
>       Version 3.7
>            no assumed_gamma
>            display_gamma=1.0
>            file_gamma=1.0
>
> seems to produce the same result as
>
>       Version 3.6:
>            assumed_gamma 2.2

Yes, that's to be expected.

Note however that, technically speaking, working with assumed_gamma 2.2 
/is/ wrong already, so it's no surprise you need to mess up your 
settings to get the expected results.

The officially /right/ way to address the washed-out appearance you see 
in 3.7 is to fix all the colors you use in your existing scenes: Raise 
all RGB color values (but not transmit or filter) to the power of 2.2 
and you should be quite ok with display_gamma=2.2 and file_gamma=2.2 in 
3.7. Where that still doesn't match your expectations, you're actually 
expecting physically unrealistic results. (For that "X", for instance, 
you may need to reduce radiosity brightness to get what you expect.)

For backwards compatibility, using a "#version 3.6" statement and 
"assumed_gamma 2.2" should also give you the same results as 3.6, but 
this is not recommended for new scenes.


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