POV-Ray : Newsgroups : povray.binaries.images : Strange light behaviour : Re: Strange light behaviour Server Time
5 Nov 2024 10:21:49 EST (-0500)
  Re: Strange light behaviour  
From: Mike Raiford
Date: 6 Sep 2005 10:30:53
Message: <431da81d$1@news.povray.org>
Rick Measham wrote:
> Xplo Eristotle wrote:
> 
>> Holy crap!
> 
> 
> Excellent! I've always wanted to extract a 'Holy Crap' from someone :)
> 
> OK, I've brought those values back to your recommendation, but then 
> things started getting really really weird. So I decreased the amount of 
> light flying around (my sun was at White * 40, and the skysphere was 
> (some blue)*5).
> 
> Now the interior of the room is almost pitch black.
> 
> I've also tried adding the tiniest amount of reflection and fairly heavy 
> diffusion to everything in the hope of getting it looking better.
> 
> I'm going to look at light_sys once I get a chance, but I'm really 
> interested in why this isn't working.
> 
> (You'll notice in the corners, there's still a little brightness, and 
> there's still strange patterns there ..)
> 
> Cheers!
> Rick Measham
> 
>     radiosity {
>         pretrace_start 0.08
>         pretrace_end   0.04
>         count 85
> 
>         nearest_count 5
>         error_bound 0.5
>         recursion_limit 2
> 
>         low_error_factor 0.5
>         gray_threshold 0.0
>         minimum_reuse 0.015
>         brightness 1.2
> 
>         adc_bailout 0.01/2
>     }
> 
> 
> ------------------------------------------------------------------------
> 


Also, add to your global settings block assumed_gamma 1.0 (some will 
disagree) so long as your monitor gamma is set right (defaults to 2.2, I 
think, which is typical for a PC) it should get you a better tonal 
range. Higher counts are a must, and can add greatly to the scene (at 
the cost of render time)

hth.


-- 
~Mike

Things! Billions of them!


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