Are those shadow rings normal? I tryed to incrase the radiosity settings,
but that only reduces the effect a bit and takes vary long to render. There
are no problems with perspective camera.

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Have you tried to raise the max trace level?

--
Jonathan

"ARTis" <art### [at] aaaapollolv> ha scritto nel messaggio
news:3bbe6930@news.povray.org...
> Are those shadow rings normal? I tryed to incrase the radiosity settings,
> but that only reduces the effect a bit and takes vary long to render.
There
> are no problems with perspective camera.
>
>
>

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The only thing that helps is changing low_error_factor, but it makes it so
SLOW. What makes me wonder is that there are no problems with perspective
camera -- where does the difference comes from?

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I must say that it looks like an usual *reflective objects and radiosity*
problem to me. Are you sure that raising the max trace level (try something
like 30) doesn't help?

--
Jonathan.

"ARTis" <art### [at] aaaapollolv> ha scritto nel messaggio
news:3bbefc3b@news.povray.org...
> The only thing that helps is changing low_error_factor, but it makes it so
> SLOW. What makes me wonder is that there are no problems with perspective
> camera -- where does the difference comes from?
>
>

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> I must say that it looks like an usual *reflective objects and radiosity*
> problem to me. Are you sure that raising the max trace level (try
something
> like 30) doesn't help?

Did I sad raising the low_error_factor was slow -- if it ever shows
something on screen I tell you about the results...

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I restarted windows and now it goes really quick (and without shadow rings
thank you JRG) but before it hung on 8% with every max trace over 13...

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"ARTis" <art### [at] aaaapollolv> wrote...
> Are those shadow rings normal? I tryed to incrase the radiosity settings,
> but that only reduces the effect a bit and takes vary long to render.
There
> are no problems with perspective camera.

Some of the math in the radiosity calculations do assume a perspective
camera.  It uses some approximations to decrease accuracy as rays get
farther away from the camera.  This is done to speed up rendering.  You
should still be able to achieve good results with other cameras, but the
render time might be slightly affected.  (Note that I say "slightly"
affected... it should be possible to get reasonable results without it
taking too much longer.)

Eventually we might be able to incorporate ray-differentials to replace this
approximation with a true representation, but that is far in the future.

-Nathan

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Just a shot in the dark, but you could try rendering the scene with a
perspective camera and saving the radiosity file, change to the spherical
camera and reload the radiosity file.

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