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Hi all,
I have a problem with POV Ray 3.6 and radiosity. Random black spots appear
that aren't there when I render the same file in 3.5
Take a look at this file (PR 3.6)
http://www.brickshelf.com/gallery/jeroendehaan/Renders/povray360.jpg
and this (PR 3.5)
http://www.brickshelf.com/gallery/jeroendehaan/Renders/povray350.jpg
These are the radiosity settings:
global_settings {
max_trace_level 20
radiosity {
brightness 1
count 300
distance_maximum 100
error_bound 0.25
gray_threshold 0.50
low_error_factor 0.775
minimum_reuse 0.015
nearest_count 8
recursion_limit 1
}
}
and for the colours:
#declare lg_color_B00 = texture {
pigment { rgbft <0, 0.0749999999999997, 0.9, 0, 0> }
normal { bumps .01 scale .10 turbulence 0 }
finish {
ambient .0
diffuse 1
brilliance 1
phong 1 phong_size 40
specular 1
reflection { .05 falloff 1 exponent 1 }
conserve_energy
}
}
This is for blue. All the colours use the same normal and finish.
Is it me, a wrong setting or a "bug" in 3.6?
Jeroen de Haan
If you want the complete file please e-mail me on infor at digitalbricks dot
nl
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jeroen de haan wrote:
> Hi all,
>
> I have a problem with POV Ray 3.6 and radiosity. Random black spots appear
> that aren't there when I render the same file in 3.5
>
What makes you think this has anything to do with radiosity?
Apart from that a minimal test scene will of course be required to check
this.
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 06 Jul. 2004 _____./\/^>_*_<^\/\.______
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"Christoph Hormann" <chr### [at] gmx de> wrote in message
news:ci7h7l$iqf$1@chho.imagico.de...
> jeroen de haan wrote:
> > Hi all,
> >
> > I have a problem with POV Ray 3.6 and radiosity. Random black spots
appear
> > that aren't there when I render the same file in 3.5
> >
>
> What makes you think this has anything to do with radiosity?
>
> Apart from that a minimal test scene will of course be required to check
> this.
Here is a no radiosity test from PR 3.6:
http://www.brickshelf.com/gallery/jeroendehaan/Renders/kraanpovray36noradiosity.png
Jeroen
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A similar problem was mentioned by Michael Raiford on 6/13/2004 12:20 AM in
povray.binaries.images. I don't think a solution was found, though the
consensus seemed to be that it was related to media-radiosity interaction.
- Slime
[ http://www.slimeland.com/ ]
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Slime wrote:
> A similar problem was mentioned by Michael Raiford on 6/13/2004 12:20 AM in
> povray.binaries.images. I don't think a solution was found, though the
> consensus seemed to be that it was related to media-radiosity interaction.
>
> - Slime
> [ http://www.slimeland.com/ ]
This seemed to happen in scenes that contained radiosity+scattering
media+spotlights. At least for me, this is the situation I ran across.
--
~Mike
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news:4147461f$1@news.povray.org...
> reflection { .05 falloff 1 exponent 1 }
Could you try to remove the reflection statement (particularly the exponent)
to see if it works. It solved a vaguely similar problem for another user
(see the last messages in povray.beta-test.binaries). I came upon the
black-dots-in-radiosity-scene-issue myself (though I solved it eventually by
using another object as I was a little bit in a hurry...).
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
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Gilles Tran wrote:
>
>> reflection { .05 falloff 1 exponent 1 }
>
>
> Could you try to remove the reflection statement (particularly the exponent)
> to see if it works. It solved a vaguely similar problem for another user
> (see the last messages in povray.beta-test.binaries). I came upon the
> black-dots-in-radiosity-scene-issue myself (though I solved it eventually by
> using another object as I was a little bit in a hurry...).
Note the exponent is 1 which is default. The bug report you cited had
trouble with non-default just like the scene using crand Bob Hughes
showed some time ago. Apparently the changes made to prevent those
problems did not completely slove it, the code applying the exponent
should always check for the argument being below zero. But i have never
seen the same problem with exponent 1 (and if you have a scene showing
this please post it).
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 06 Jul. 2004 _____./\/^>_*_<^\/\.______
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