POV-Ray : Newsgroups : povray.beta-test : Radiosity gives only black images : Re: Radiosity gives only black images Server Time
30 Jun 2024 17:18:56 EDT (-0400)
  Re: Radiosity gives only black images  
From: clipka
Date: 2 Sep 2010 09:03:44
Message: <4c7fa0b0@news.povray.org>
Am 02.09.2010 13:42, schrieb Darats:

> Now, the probleme is that I can't get exactely the same result as the 3.6
> version. Here my colors seem to be "washed out" (it's like everything is more
> "grey" and less shiny than on the 3.6 version). I don't know what to do.
>
> Any guess on that ?

Gamma.


This is the typical effect of gamma correction, which POV-Ray 3.6 didn't 
do properly (with the result that scenes were designed "wrong" to /look/ 
"right"), but which POV-Ray 3.7 now does a pretty good job at (with the 
result that scenes designed "wrong" now indeed /look/ "wrong".)


Now the first thing to note here is that theoretically, POV-Ray 3.7 
/should/ do gamma correction in the same "wrong" way as 3.6 when 
"#version 3.6" is used. What you observe is that this doesn't seem to be 
the case, so we /may/ still have an issue there, and I'll have a closer 
look at this.

I might need a bit of information for this purpose:

- What is the Display_Gamma setting you use (if any)?
- What is the File_Gamma setting (if any)?
- Are you using "assumed_gamma" in the scene? If so, what is it set to?
- Are you using image-based textures in the scene?

You might need to have a look at the master POVRAY.INI for this purpose. 
Note that POV-Ray 3.6 and 3.7 have separate master POVRAY.INIs.


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