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Jerome schrieb in Nachricht <39292C63.AC3565B2@iname.com>...
> Answer: don't use atmospheric media! Make a big hollow
>object that encloses your whole scene and put some object
>media in it.
>
Okay ... but why? I tried it and the effect was differend but not much
better - now everthink was totaly covered by grainy goldish spots. Should
have been much smoother und "lighter" to do the job.
> Are you using MegaPov?
No, Official Pov 3.1g. Maybe you are right and I'll want to try it but for
the time being I don't want to become confused by too many new features -
there are so many in the official version I don't even know of! But perhaps
it's the wrong way and MegaPov makes "life" so much easier?
> I'd say add another light_source situtated at the same
>place as the camera and with the shadowless keyword...
Did it ... and it lights up things as it should.
I'll keep trying ...
Thank you,
Marc-Hendrik
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Marc-Hendrik Bremer wrote:
>
> Okay ... but why? I tried it and the effect was differend but not much
> better - now everthink was totaly covered by grainy goldish spots. Should
> have been much smoother und "lighter" to do the job.
>
Simply put, POV computes the colors of the pixels by
shooting rays at the scene and looking at what they hit to
determine the color. When using media, POV shoots the ray
and looks at the start and end point, then takes samples of
the media in between to determine its effect. If you use an
atmospheric media, there is no end point (unless there's
another object behind) so POV simulates one *very far away*
which causes problems whith the sampling.
You won't be able to get completely rid of the grainy look
whith official POV, but you can improve things by increasing
the number of samples and intervals.
> > Are you using MegaPov?
>
> No, Official Pov 3.1g. Maybe you are right and I'll want to try it but for
> the time being I don't want to become confused by too many new features -
> there are so many in the official version I don't even know of! But perhaps
> it's the wrong way and MegaPov makes "life" so much easier?
>
When using media and radiosity, MegaPov makes "life" *much*
easier :) and you don't have to use the additional features
if you don't want to (those are the main reasons I use it
(all right and isosurfaces too))
Jerome
--
* Doctor Jekyll had something * mailto:ber### [at] iname com
* to Hyde... * http://www.enst.fr/~jberger
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