Thank you.

"Mark Wagner" <mar### [at] gtenet> wrote in message
news:pan### [at] gtenet...
> On Tue, 20 Aug 2002 20:23:03 -0400, Patrick Dugan quoth:
>
> > I know that if anything changes within a scene you need to save (rather
> > than load) a new photon map file.  Does the same thing hold true if you
> > alter the render size?  For example I render an image at 320x200 and
> > save the photon map.  Would I use the same map if I rendered the same
> > scene at 1280x1024 or will it need to be "reshot"?
>
> From a recent posting of mine in povray.advanced-users:
>
> >Rafal 'Raf256' Maj wrote in message ...
> >>Hi,
> >>when data for photons and/or media can NOT be safle loaded ?
> >>I ques that camera moving/rotation is alwys safe, and any other changes
is
> >>scene (objects or lights) is not safe - is this correct ?
> >
> >
> >Moving the camera is always safe.  Moving lights that do not cast photons
is
> >always safe.  Moving objects that do not have photons shot at them, that
do
> >not recieve photons, and would not recieve photons in the new location is
> >always safe.  Moving an object that recieves photons to a new location
where
> >it does not recieve photons is sometimes safe.  Moving an object to a
> >location where it recieves photons, moving an object that has photons
shot
> >at it, or moving a light that casts photons is not safe.
> >
> >Changing the texture of an object that recieves photons is safe.
Changing
> >the texture of an object that has photons shot at it produces results
that
> >are not realistic, but can be useful sometimes.
>
> In general, changes to the scene geometry require photons to be re-shot.
> Changing the camera parameters or changing the image resolution does not.
>
> --
> Mark

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