In povray.general Povray <web### [at] ultisitecom> 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.

  There must be some ambient light in order to the radiosity to be seen
(as you can see in my example code, it's even multiplied by 4, ie. 4 times
brighter ambient light than usual, so radiosity becomes very visible). If
you set the ambient light to 0, no radiosity is seen, of course.
  I think that you typoed something when adding that line again. It's the
only reason I can think of.

: 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?

  Note that there's no "universal" radiosity settings which work fine in
every scene. The radiosity settings I posted work fine with the small room
in the same post, but they don't work fine in outdoor scenes, for example.
Each scene has its own specific optimal radiosity settings. This depends on
the scale of the scene, the brightness of the colors, etc.
  Btw, are you sure you render with the +qr option when you want radiosity?
(without that option radiosity calculations are not made)

-- 
                                                           - Warp. -

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I've discovered the source of the problem, and you are most certainly
correct about the ambient light. The problem is that radiosity doesn't work
in subsequent requests if I cancel a trace. I have to close the Pov-Ray
editor and open it again, and it works fine. So, after yanking out the hair
around my ears for two days, I've finally got it down.

Thanks and much appreciation,
D.J. Brown

Nieminen Mika wrote in message <35ff7f4e.0@news.povray.org>...
>In povray.general Povray <web### [at] ultisitecom> 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.
>
>  There must be some ambient light in order to the radiosity to be seen
>(as you can see in my example code, it's even multiplied by 4, ie. 4 times
>brighter ambient light than usual, so radiosity becomes very visible). If
>you set the ambient light to 0, no radiosity is seen, of course.
>  I think that you typoed something when adding that line again. It's the
>only reason I can think of.
>
>: 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?
>
>  Note that there's no "universal" radiosity settings which work fine in
>every scene. The radiosity settings I posted work fine with the small room
>in the same post, but they don't work fine in outdoor scenes, for example.
>Each scene has its own specific optimal radiosity settings. This depends on
>the scale of the scene, the brightness of the colors, etc.
>  Btw, are you sure you render with the +qr option when you want radiosity?
>(without that option radiosity calculations are not made)
>
>--
>                                                           - Warp. -

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Chris Maryan <cma### [at] geocitiescom> writes:

> 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!!!

I rendered my first scene that uses radiosity yesterday. So, I'm also
quite new to it. However, you didn't mention that you have set 
distance_maximum. According to the docs this is essential.
A description of this parameter is found in section 7.8.9.2.3.

I hope this helps


-- 
Tho### [at] uni-konstanzde
http://www.fmi.uni-konstanz.de/~willhalm/
Tschieses lavs ju

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I've been able to solve my problem, it seems to be caused by stopping a
radiosity rendering from Moray before it's finished and then attempting
to render again. Anyway, the solution is to restart Moray and POV if you
stop a radiosity rendering before it's finished, otherwise the final
pass of the next rendering will turn out looking like a raytraced
rendering. I have yet to discover if this problem is in POVRay or the
way Moray controls POV.
 
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.

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Thomas Willhalm wrote:

> I rendered my first scene that uses radiosity yesterday. So, I'm also
> quite new to it. However, you didn't mention that you have set
> distance_maximum. According to the docs this is essential.
> A description of this parameter is found in section 7.8.9.2.3.

I've been playing around with my image (now that it works, see my other
reply in povray.general) and have come to the conclusion that
distance_maximum doesn't have as much of a bearing on the image as the
docs would have you believe, I tried values ranging from 1 (the distance
to the nearest object in my image) to 30(the total size of everything
visible in my image) and there have been no serious changes in the way
the scene renders.

-- 
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.

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Chris Maryan wrote in message <35C9ECA4.54C854DD@geocities.com>...
>I've been able to solve my problem, it seems to be caused by stopping a
>radiosity rendering from Moray before it's finished and then attempting
>to render again. Anyway, the solution is to restart Moray and POV if you
>stop a radiosity rendering before it's finished, otherwise the final
>pass of the next rendering will turn out looking like a raytraced
>rendering. I have yet to discover if this problem is in POVRay or the
>way Moray controls POV.
>

I have the same problem, working only with POV (I submitted a bug report).
Same diagnostic : radiosity doesn't work after interrupted rendering.
But the demo file included with POV does not seem to be affected by this
bug.
And I do not know why. ;(

Reply to: phi### [at] hotmailcom

NOT TO mdebar (I am just using his computer)

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