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From: Thomas de Groot
Subject: Now that we are talking radiosity...
Date: 30 Dec 2008 03:57:19
Message: <4959e26f@news.povray.org>
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This is a WIP scene that has remained in limbo for up to a year. In the mean
time, I had discussions about radiosity with Hildur Kolbrun, and now
recently through the work of Clipka the radiosity issue is alive again.
I decided to rerender the scene with what I had learned. This is the result.
I am rather satisfied, especially when compared with older renders. Lighting
is provided by an area_light and the ambient setting of the diffuser screen
below the ceiling. WinXP with MegaPov.
The radiosity settings used:
radiosity {
#if (MPov)
adaptive 1
#end
brightness 1.0
count 100
error_bound 0.15
gray_threshold 0.0
low_error_factor 0.2
minimum_reuse 0.015
nearest_count 10
recursion_limit 1
adc_bailout 0.005
max_sample 0.5
media off
normal off
always_sample 1
pretrace_start 0.08
pretrace_end 0.005
}
Thomas
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Attachments:
Download 'De Dulle Griet_12.jpg' (119 KB)
Preview of image 'De Dulle Griet_12.jpg'
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From: Jaime Vives Piqueres
Subject: Re: Now that we are talking radiosity...
Date: 30 Dec 2008 04:23:22
Message: <4959e88a@news.povray.org>
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> radiosity {
> #if (MPov)
> adaptive 1
I will add "randomize on" there... works nicely for some artefacts.
BTW, if the rust on the mirror are artefacts, I must say you placed them
very well! ;)
--
Jaime
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From: Thomas de Groot
Subject: Re: Now that we are talking radiosity...
Date: 30 Dec 2008 08:22:11
Message: <495a2083@news.povray.org>
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"Jaime Vives Piqueres" <jai### [at] ignorancia org> schreef in bericht
news:4959e88a@news.povray.org...
>> radiosity {
>> #if (MPov)
>> adaptive 1
>
> I will add "randomize on" there... works nicely for some artefacts.
Excellent. forgot that.
>
> BTW, if the rust on the mirror are artefacts, I must say you placed them
> very well! ;)
Yeah... The art of placing these artefacts has been learned at great cost
:-)
Thomas
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"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
> :-)
>
> Thomas
How long would it take if you replaced the picture on the wall with another
mirror?
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Very good! Except for the black splotches in the mirror, of course. But that
is about to end, I guess...
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From: Thomas de Groot
Subject: Re: Now that we are talking radiosity...
Date: 31 Dec 2008 03:02:23
Message: <495b270f@news.povray.org>
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"alphaQuad" <alp### [at] earthlinknet> schreef in bericht
news:web.495a461128285c8a7a70bc830@news.povray.org...
> "Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
>> :-)
>>
>> Thomas
>
>
> How long would it take if you replaced the picture on the wall with
> another
> mirror?
>
Hmm. I have done some Infinity Box scenes in the past, longer than a
*normal* render of course, but I don't remember how much longer. See old
examples here.
Thomas
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Attachments:
Download 'Infinity Box_04.jpg' (138 KB)
Download 'library_04.jpg' (87 KB)
Preview of image 'Infinity Box_04.jpg'
Preview of image 'library_04.jpg'
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"nemesis" <nam### [at] gmailcom> schreef in bericht
news:web.495a774928285c8a180057960@news.povray.org...
> Very good! Except for the black splotches in the mirror, of course. But
> that
> is about to end, I guess...
>
>
<grin>
the black splotches in the mirror are *not* artefacts! They are supposed to
show the age of the mirror. I used a boxed pattern to achieve them...
However, interesting that you saw them as artefacts :-) What the render
needs of course, is a better aa, especially for the wood pattern of the
mirror frame.
Thomas
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"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
> "nemesis" <nam### [at] gmailcom> schreef in bericht
> news:web.495a774928285c8a180057960@news.povray.org...
> > Very good! Except for the black splotches in the mirror, of course. But
> > that
> > is about to end, I guess...
> >
> >
>
> <grin>
> the black splotches in the mirror are *not* artefacts! They are supposed to
> show the age of the mirror. I used a boxed pattern to achieve them...
Hmm, come to think of it, if it was radiosity splotches due to reflection they
would be pretty much all around... Well done, then! That's attention to detail
far exceeding what I'd expect from CG: it's all to easy to forget mirrors do
age and are not perfect specular reflectors... :P
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"nemesis" <nam### [at] gmailcom> schreef in bericht
news:web.495b874928285c8a180057960@news.povray.org...
>> >
>>
>> <grin>
>> the black splotches in the mirror are *not* artefacts! They are supposed
>> to
>> show the age of the mirror. I used a boxed pattern to achieve them...
>
> Hmm, come to think of it, if it was radiosity splotches due to reflection
> they
> would be pretty much all around... Well done, then! That's attention to
> detail
> far exceeding what I'd expect from CG: it's all to easy to forget mirrors
> do
> age and are not perfect specular reflectors... :P
>
In addition, the color is somewhat attenuated too.
Thomas
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