POV-Ray : Newsgroups : povray.binaries.images : Bolts : Re: Bolts Server Time
14 Apr 2026 05:09:10 EDT (-0400)
  Re: Bolts  
From: Kari Kivisalo
Date: 31 Jan 2002 11:56:32
Message: <3C597777.E34FDECE@engineer.com>
Grey Knight wrote:
>
> I was thinking "gamma problem" too.

The real problem is mismatched contrast ranges. The standard way of
lighting CG produces low contrast scenes and using radiosity amplifies
the effect because it's trying to simulate reality with wrong input
data. One way to deal with it is to use gamma as contrast control:
assumed_gamma 1+(Display_Gamma-1)*Contrast, 0 < Contrast < 1

Some scenes just are low contrast by nature and require transfer curve
editing. Then you dig up the curve editor and twist away until the image
looks right, or hope the automagic adjustment does a good job.


_____________
Kari Kivisalo


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