POV-Ray : Newsgroups : povray.advanced-users : Converting pre-gamma scenes to assumed_gamma = 1? : Re: Converting pre-gamma scenes to assumed_gamma = 1? Server Time
8 May 2024 19:33:08 EDT (-0400)
  Re: Converting pre-gamma scenes to assumed_gamma = 1?  
From: SharkD
Date: 9 Jun 2010 17:33:21
Message: <4c1008a1@news.povray.org>
On 6/9/2010 5:04 PM, clipka wrote:
> Am 09.06.2010 21:57, schrieb SharkD:
>> On 6/9/2010 7:26 AM, clipka wrote:
>>>
>>> (2) Gamma-adjust all color literals, by raising the R,G,B components to
>>> the power of 2.2 (or wait for the next beta, and add "gamma 2.2" to the
>>> color literal). Check your scene for colour values that are computed
>>> from some other values - you may (or may not) want to gamma-adjust these
>>> as well.
>>
>> Are you sure about raising to a power? Old scenes are generally brighter
>> in 3.7 than they were originally, so wouldn't you want to lower them
>> instead?
>
> Yes, I am sure; note that raising values between 0.0 and 1.0 to some
> power > 1 does actually give you smaller values (e.g. 0.50^2 = 0.25).

Oh, OK! Just tested it and everything looks good so far.

-- 
http://isometricland.com


Post a reply to this message

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