POV-Ray : Newsgroups : povray.beta-test : Same scene renders different in v3.7beta34 versus v3.62 : Re: Same scene renders different in v3.7beta34 versus v3.62 Server Time
5 Oct 2024 15:32:08 EDT (-0400)
  Re: Same scene renders different in v3.7beta34 versus v3.62  
From: clipka
Date: 8 Sep 2009 14:38:54
Message: <4aa6a4be$1@news.povray.org>
Nicolas Alvarez schrieb:
>>   One reason can be that I want to match exactly the image pixel values
>>   with
>> HTML colors. If I want the color scheme of an image to match, for example,
>> the background color of a HTML page, I should be able to do that.
> 
> Wouldn't the browser do gamma correction according to the gAMA chunk anyway?

Yes, but Warp's problem was that HTML "50% grey" (#7F7F7F) is /not/ 
POV.Ray 0.5 grey.

Browser gamma correction will make sure POV-Ray 0.5 grey is properly 
converted to 50% /brightness/, but HTML "50% grey" is 50% /voltage/ (at 
the VGA output of a typical PC), equaling 22% brightness.


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