One day I'll actually look at the source myself (I've got it lying around on
some partition somewhere), 'till then, can anyone tell me what precise
format POV does use? Is it 32bit, 64bit or something else?  Does this vary
from platform to platform?  If it is less than 64bit, when will this be
changed?

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Edward C. <edw### [at] hotmailcom> wrote:
: One day I'll actually look at the source myself (I've got it lying around on
: some partition somewhere), 'till then, can anyone tell me what precise
: format POV does use? Is it 32bit, 64bit or something else?  Does this vary
: from platform to platform?  If it is less than 64bit, when will this be
: changed?

  AFAIK povray uses the 'double' type for most of its floating point
calculations. This type is 64 bits in most computers.

-- 
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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You might try upping the count value, as this will improve the quality. Also,
I've found that a good trick for setting distance_maximum is to use one third of
the distance between the camera location and the look_at. Finally, if you add a
bit of normal to your wall, like a bozo .2, the shadow banding is much less
noticable.

Nieminen Mika wrote:

>   I'm trying to find proper radiosity settings for an indoors scene.
> However, no matter what I do, I get one of the following:
>   1. Very blotchy illumination, like someone was throwing paint on the
> walls at random.
>   2. Quite smooth illumination but somewhat grainy and extremely annoying
> small dark spots in corners.
>
>   I get the second type of illumination with settings which take centuries
> to calculate (in my P-II 350MHz). If I use a little bit faster settings
> I get the first type of illumination.
>   Those dark spots in the second case appear no matter how small
> error_bound I specify (I have gone as small as error_bound 0.05).
>   The distance_maximum seems to be the key value which controls how much
> the image goes to the first or the second case. With large distance_maximum
> values the image gets blotchy while with small values it gets grainy.
> I have tried several values between 1000 (the room is about 200 units wide)
> and 1. With very small values the render time blows up and the walls look
> like they had a finish { crand .2 }.
>   The rendering time doesn't matter, but I just can't get rid of the
> graininess and the annoying dark spots in the corners. The only way I
> can do this is setting so bad values that the image gets blotchy, but that's
> not a very good solution.
>   Does anyone has any good advice?
>
>   It's funny that I got really good values for the radiosity test images
> in my web page, but I can't find them for this image (of course the settings
> for those radiosity test images do not work with this image).
>
> --
> 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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