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I have recently been experimenting with radiosity in POVRay but have had
no success. I am using Moray to control the radiosity settings in a
simple courtyard scene I created to test (based on this image:
http://www.lightscape.com/Contest98/az_honor.jpg, but just a bare bones
version). My problem is that the radiosity rendering is no different
from the raytraced rendering (yes I set POV to radiosity mode). That is,
it does not change any of the areas not lit by direct light, just one
big ambient colour mess, I can't make out any details in it, just what
would happen if I rendered without radiosity. So what am I doing wrong
(Other test renderings of other scenes have similar results)? HELP!!!
Thanks,
Chris Maryan
mailto:cma### [at] geocities com
***
My ideas are free,
Work is at least minimum wage.
***
Email me if you are interested in donating
to the Chris Maryan needs money fund,
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In povray.general Chris Maryan <cma### [at] geocitiescom> wrote:
: I have recently been experimenting with radiosity in POVRay but have had
: no success. I am using Moray to control the radiosity settings in a
: simple courtyard scene I created to test (based on this image:
: http://www.lightscape.com/Contest98/az_honor.jpg, but just a bare bones
: version). My problem is that the radiosity rendering is no different
: from the raytraced rendering (yes I set POV to radiosity mode). That is,
: it does not change any of the areas not lit by direct light, just one
: big ambient colour mess, I can't make out any details in it, just what
: would happen if I rendered without radiosity. So what am I doing wrong
: (Other test renderings of other scenes have similar results)? HELP!!!
Radiosity parameters are really dificult to understand. I don't understand
them very well. You have to read the povray documentation very carefully to
get the right values.
I have been playing with radiosity as well, but with much better results.
You can check them at http://www.iki.fi/warp/pics/Radiosity_test/
I can post the radiosity values of those images if you want.
--
- Warp. -
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Nieminen Mika wrote:
> Radiosity parameters are really dificult to understand. I don't understand
> them very well. You have to read the povray documentation very carefully to
> get the right values.
> I have been playing with radiosity as well, but with much better results.
> You can check them at http://www.iki.fi/warp/pics/Radiosity_test/
> I can post the radiosity values of those images if you want.
Your images do a great job of showing what radiosity does, are you using
area lights in the top two images?
Thanks for your help but I solved the problem, apparently some kind of
bug (see my other post to povray.general on this thread).
Does anyone know how I can increase the amount of light being diffusely
reflected by a texture without raising the ambient level (My scene has a
wide range of contrast and if I keep the ambient low, there isn't enough
detail in the shadows, if I raise the ambient, the bright areas become
pure white, I need brighter shadows and darker highlights(I never
thought photography would come back to haunt me :-) ).
--
Chris Maryan
mailto:cma### [at] geocitiescom
***
My ideas are free,
Work is at least minimum wage.
***
Email me if you are interested in donating
to the Chris Maryan needs money fund.
Post a reply to this message
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In povray.general Chris Maryan <cma### [at] geocitiescom> wrote:
: Your images do a great job of showing what radiosity does, are you using
: area lights in the top two images?
Yes.
--
- Warp. -
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Yes Please
Mike Hazelgrove
Nieminen Mika <war### [at] assaricctutfi> wrote in article
<35c9831f.0@news.povray.org>...
> In povray.general Chris Maryan <cma### [at] geocitiescom> wrote:
> : I have recently been experimenting with radiosity in POVRay but have
had
> : no success. I am using Moray to control the radiosity settings in a
> : simple courtyard scene I created to test (based on this image:
> : http://www.lightscape.com/Contest98/az_honor.jpg, but just a bare bones
> : version). My problem is that the radiosity rendering is no different
> : from the raytraced rendering (yes I set POV to radiosity mode). That
is,
> : it does not change any of the areas not lit by direct light, just one
> : big ambient colour mess, I can't make out any details in it, just what
> : would happen if I rendered without radiosity. So what am I doing wrong
> : (Other test renderings of other scenes have similar results)? HELP!!!
>
> Radiosity parameters are really dificult to understand. I don't
understand
> them very well. You have to read the povray documentation very carefully
to
> get the right values.
> I have been playing with radiosity as well, but with much better
results.
> You can check them at http://www.iki.fi/warp/pics/Radiosity_test/
> I can post the radiosity values of those images if you want.
>
> --
> - Warp. -
>
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> I have been playing with radiosity as well, but with much better
results.
> You can check them at http://www.iki.fi/warp/pics/Radiosity_test/
> I can post the radiosity values of those images if you want.
Very nice, very helpful. I would be interested in seeing the values you
used.
Jon
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In povray.general Jon Berndt <jsb### [at] hal-pcorg> wrote:
: Very nice, very helpful. I would be interested in seeing the values you
: used.
global_settings
{ ambient_light <1,1,1>*4
radiosity
{ brightness 8
count 400
distance_maximum 1
error_bound .2
gray_threshold .1
low_error_factor .5
minimum_reuse .001
nearest_count 6
recursion_limit 1
}
}
camera { location -z*17 look_at 0 }
// Room
difference
{ box { <-12,-9,-19><12,9,12> }
box { <-11,-8,-18><11,8,11> }
pigment { rgb <1,1,.8> }
}
box
{ <-11,-8,-18><-10.99,8,11>
pigment { rgb <1,.5,0> }
}
box
{ <11,-8,-18><10.99,8,11>
pigment { rgb <0,.5,1> }
}
--
- Warp. -
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I'm having the same problems with radiosity not working, with the exception
that mine works -some- of the time. I recall once that radiosity worked
after I removed one line, and that was the -ambient_light Black - line.
Then I put it back and it rendered with radiosity fine. I've yet to find a
pattern to radiosity not working after having tried over 75 renderings on
the same scene with small modifications. I used the settings below, having
the scale of my scene approximately that shown, and it did not correct any
problems. Is there a bug I should know about that may be causing this?
-D.J. Brown
Nieminen Mika wrote in message <35d1958f.0@news.povray.org>...
>In povray.general Jon Berndt <jsb### [at] hal-pcorg> wrote:
>: Very nice, very helpful. I would be interested in seeing the values you
>: used.
>
>global_settings
>{ ambient_light <1,1,1>*4
> radiosity
> { brightness 8
> count 400
> distance_maximum 1
> error_bound .2
> gray_threshold .1
> low_error_factor .5
> minimum_reuse .001
> nearest_count 6
> recursion_limit 1
> }
>}
>
>camera { location -z*17 look_at 0 }
>
>// Room
>difference
>{ box { <-12,-9,-19><12,9,12> }
> box { <-11,-8,-18><11,8,11> }
> pigment { rgb <1,1,.8> }
>}
>box
>{ <-11,-8,-18><-10.99,8,11>
> pigment { rgb <1,.5,0> }
>}
>box
>{ <11,-8,-18><10.99,8,11>
> pigment { rgb <0,.5,1> }
>}
>
>
>
>--
> - Warp. -
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HEY everbody ! Povray is now answering questions on this group.
WOW !
Ken
Povray wrote:
> I'm having the same problems with radiosity not working, with the exception
> that mine works -some- of the time. I recall once that radiosity worked
> after I removed one line, and that was the -ambient_light Black - line.
> Then I put it back and it rendered with radiosity fine. I've yet to find a
> pattern to radiosity not working after having tried over 75 renderings on
> the same scene with small modifications. I used the settings below, having
> the scale of my scene approximately that shown, and it did not correct any
> problems. Is there a bug I should know about that may be causing this?
>
> -D.J. Brown
> Nieminen Mika wrote in message <35d1958f.0@news.povray.org>...
> >In povray.general Jon Berndt <jsb### [at] hal-pcorg> wrote:
> >: Very nice, very helpful. I would be interested in seeing the values you
> >: used.
> >
> >global_settings
> >{ ambient_light <1,1,1>*4
> > radiosity
> > { brightness 8
> > count 400
> > distance_maximum 1
> > error_bound .2
> > gray_threshold .1
> > low_error_factor .5
> > minimum_reuse .001
> > nearest_count 6
> > recursion_limit 1
> > }
> >}
> >
> >camera { location -z*17 look_at 0 }
> >
> >// Room
> >difference
> >{ box { <-12,-9,-19><12,9,12> }
> > box { <-11,-8,-18><11,8,11> }
> > pigment { rgb <1,1,.8> }
> >}
> >box
> >{ <-11,-8,-18><-10.99,8,11>
> > pigment { rgb <1,.5,0> }
> >}
> >box
> >{ <11,-8,-18><10.99,8,11>
> > pigment { rgb <0,.5,1> }
> >}
> >
> >
> >
> >--
> > - Warp. -
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Sorry, didn't realize I had typed in "Povray" for the name.. Hehe... :)
(red-faced grin)
Ken wrote in message <35FE42E4.58A73427@pacbell.net>...
>HEY everbody ! Povray is now answering questions on this group.
>WOW !
>
>Ken
>
>Povray wrote:
>
>> I'm having the same problems with radiosity not working, with the
exception
>> that mine works -some- of the time. I recall once that radiosity worked
>> after I removed one line, and that was the -ambient_light Black - line.
>> Then I put it back and it rendered with radiosity fine. I've yet to find
a
>> pattern to radiosity not working after having tried over 75 renderings on
>> the same scene with small modifications. I used the settings below,
having
>> the scale of my scene approximately that shown, and it did not correct
any
>> problems. Is there a bug I should know about that may be causing this?
>>
>> -D.J. Brown
>> Nieminen Mika wrote in message <35d1958f.0@news.povray.org>...
>> >In povray.general Jon Berndt <jsb### [at] hal-pcorg> wrote:
>> >: Very nice, very helpful. I would be interested in seeing the values
you
>> >: used.
>> >
>> >global_settings
>> >{ ambient_light <1,1,1>*4
>> > radiosity
>> > { brightness 8
>> > count 400
>> > distance_maximum 1
>> > error_bound .2
>> > gray_threshold .1
>> > low_error_factor .5
>> > minimum_reuse .001
>> > nearest_count 6
>> > recursion_limit 1
>> > }
>> >}
>> >
>> >camera { location -z*17 look_at 0 }
>> >
>> >// Room
>> >difference
>> >{ box { <-12,-9,-19><12,9,12> }
>> > box { <-11,-8,-18><11,8,11> }
>> > pigment { rgb <1,1,.8> }
>> >}
>> >box
>> >{ <-11,-8,-18><-10.99,8,11>
>> > pigment { rgb <1,.5,0> }
>> >}
>> >box
>> >{ <11,-8,-18><10.99,8,11>
>> > pigment { rgb <0,.5,1> }
>> >}
>> >
>> >
>> >
>> >--
>> > - Warp. -
>
>
>
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