Hello,

   I tried to use "always sample no" directive in radiosity block
   and it still create radiosity samples when rendering in final
   resolution. I really need it, because (and it may be another
   question) it takes forever when rendering some specific line
   in image, it calculates radiosity sample for every ray used
   in antialiasing, I think. I guess, that its line when plane
   touches the horizont.

   Its a bug or I'am doing something bad?

Thanks

Disnel

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Disnel <dis### [at] itamcascz> wrote...
>
> Hello,
>
>    I tried to use "always sample no" directive in radiosity block
>    and it still create radiosity samples when rendering in final
>    resolution. I really need it, because (and it may be another
>    question) it takes forever when rendering some specific line
>    in image, it calculates radiosity sample for every ray used
>    in antialiasing, I think. I guess, that its line when plane
>    touches the horizont.
>
>    Its a bug or I'am doing something bad?
>

MegaPov tries to reuse samples.  If it cannot reuse ANY samples, it will
still create another sample regardless of the "always_sample" setting.  This
usually does not happen, but it can, depending on the radiosity quality
settings that you use.

-Nathan

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Hmm, its perfectly logical

It nearly hangs up at line where infinite plane touches the sky.
(plane horizont is parallel to image x axis).
I think, that its general problem. POV has problems with antialising
at this line too.

Nathan Kopp wrote:
> 
> Disnel <dis### [at] itamcascz> wrote...
> >
> > Hello,
> >
> >    I tried to use "always sample no" directive in radiosity block
> >    and it still create radiosity samples when rendering in final
> >    resolution. I really need it, because (and it may be another
> >    question) it takes forever when rendering some specific line
> >    in image, it calculates radiosity sample for every ray used
> >    in antialiasing, I think. I guess, that its line when plane
> >    touches the horizont.
> >
> >    Its a bug or I'am doing something bad?
> >
> 
> MegaPov tries to reuse samples.  If it cannot reuse ANY samples, it will
> still create another sample regardless of the "always_sample" setting.  This
> usually does not happen, but it can, depending on the radiosity quality
> settings that you use.
> 
> -Nathan

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Disnel <dis### [at] itamcascz> wrote:
: POV has problems with antialising at this line too.

  I wouldn't say that "povray has problems antialising at this line". What's
happening is just that a lot of to-be-antialiased pixels are unluckily
grouped so that they are calculated one after another.
  If the line was vertical instead of horizontal I suppose that the
render time would be approximately the same, but the antialiasing
would be more scattered around the image so you wouldn't notice this
kind of "lockup".

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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