POV-Ray : Newsgroups : povray.general : Bug when using radiosity + photons + dispersion Server Time
3 Aug 2024 14:19:25 EDT (-0400)
  Bug when using radiosity + photons + dispersion (Message 1 to 2 of 2)  
From: Rafal 'Raf256' Maj
Subject: Bug when using radiosity + photons + dispersion
Date: 25 Feb 2004 22:13:35
Message: <Xns949B2AEF062F9raf256com@203.29.75.35>
Just a quick info, I'll post full bug-report with test and minimalistic 
scene to reproduce bug tomorrow.

In 3.6 there stil is a bug that I reporded about half year ago in 3.5

Sometimes when using photons (refracted) and radiosity, colors of photons 
[spots] are wrong. In 3.5 "wrong" ment that their was in gray-scale, in 3.6  
I noticed either that, or - red component was missing (only green-blue 
photons).

Scene: Put an glass ball with ior say 1.5 and some dispersion on a ground 
(white plane). use photons on sphere  (target on),  use radiosity.

Reproduction of bug:
* wen You STOP render in it's pre-rendre radiosity phase and re-run it 
without restarting (frequency - about 1 in 4 times in Pov 3.5 and 3.6). 
Restarting Pov helps, with might suggest some kind of memory leak, or 
uninitialized variable.

* even when You normaly start render (without STOPing it first) same thing 
happends I think (frequency - I noticed in only once in about 30 renders, 
only in 3.6)

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M


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From: ABX
Subject: Re: Bug when using radiosity + photons + dispersion
Date: 26 Feb 2004 02:54:51
Message: <kg9r305v7ibcrcji7sft2qub6eafra23au@4ax.com>
On 25 Feb 2004 22:13:35 -0500, "Rafal 'Raf256' Maj" <spa### [at] raf256com> wrote:
> Just a quick info, I'll post full bug-report with test and minimalistic 
> scene to reproduce bug tomorrow.

Please do not forget rest of bug-reporting guidelines then. TIA,

ABX


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