Nathan Kopp wrote:
> 
> Ken wrote:
> >
> >   Thank you for your replies to my questions. In regards to the
> > term caustics as used above I have one more little question.
> > With the photon patch is it necessary to use the caustics interior
> > modifier for the caustic reflections ? It doesn't seem likely to me
> > but I have not heard explicitly one way or another on the this and
> > would like a clarification for sake of proceedural accuracy.
> 
> The 'caustics' keyword will have no effect on photon mapping.
> 
> -Nathan

  I suspected as much but wanted it confirmed ono the less. Thanks.


  I just posted your request for a photon patch, user generated
disco like mirrored ball, reflecting multiple beams of colored
light, which appear as spots of multicoloured lights illuminating
the surrounding walls, into the povray.binaries.images group.

  I would just like to go on record after this little exercise as
saying it sure would have been easier had I been able to use spot
lights for the light sources. Trying to hide 60 colored lights with
an intensity of 1.8 is a challenge unto itself without the aid of
the programs spotlight light_source modifier. Had I not hidden them
they would have washed out the desired effects. In consequence they
had to be obscured from everything but the reflective surfaces they
were pointed at. Not insurmountable but but uniquely challenging to
say the least.

  If anyone wants the source for this to do an animation with I am more
that willing to hand it off to someone else to peruse. A 600x400 with
the current settings took 15.6 minutes to render and maybe 1.5 to parse
on my P-200 machine.

-- 
Ken Tyler

mailto://tylereng@pacbell.net

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Ken <tyl### [at] pacbellnet> wrote:
:   If anyone wants the source for this to do an animation with I am more
: that willing to hand it off to someone else to peruse. A 600x400 with
: the current settings took 15.6 minutes to render and maybe 1.5 to parse
: on my P-200 machine.

  I can make that animation in my PII-350 (with a limitation: I don't have
net connection at home, so I will only carry the resulting mpeg in
disquettes, not all the frames...)

-- 
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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Ken wrote:
> 
>   I would just like to go on record after this little exercise as
> saying it sure would have been easier had I been able to use spot
> lights for the light sources. Trying to hide 60 colored lights with
> an intensity of 1.8 is a challenge unto itself without the aid of
> the programs spotlight light_source modifier. Had I not hidden them
> they would have washed out the desired effects. In consequence they
> had to be obscured from everything but the reflective surfaces they
> were pointed at. Not insurmountable but but uniquely challenging to
> say the least.

60 lights!!! wow!  You could have used spotlights, by the way.  It's
just that the photon part treats them as point lights... meaning that,
while during the regular trace part they'll act like spotlights, photons
can shoot out of them in any direction.  Of course, this won't always
be the case... I just didn't code that part yet.

-Nathan

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