See "Photon - Cornell Box" in povray.general, posted on 20.02.03,
and see "Diffuse Photon Casting" in povray.text.scene-files

--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde

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Second pass on "all_phot.pov", scene-file in povray.text.scene-files

First pass generates photons using specular reflection on all
object (yup, all of em), second pass just loads the photons and
uses diffuse textures (so no reflection there).

Interesting effect, though not satisfying for global-illumination.

My personal comment: stick to radiosity for global-illumination
attempts.
:-)

Regards,
Tim

--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde

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On Fri, 21 Feb 2003 13:32:16 +0100, Tim Nikias wrote:

> Second pass on "all_phot.pov", scene-file in povray.text.scene-files
> 
> First pass generates photons using specular reflection on all
> object (yup, all of em), second pass just loads the photons and
> uses diffuse textures (so no reflection there).
> 
> Interesting effect, though not satisfying for global-illumination.
> 
> My personal comment: stick to radiosity for global-illumination
> attempts.
>:-)
> 
> Regards,
> Tim

Try shooting lots more photons on the first pass and making a severely 
bumpy micro-normal. This might blur the reflections enough to get good 
results. A little while ago I tried to do a similar trick using micro 
normals to simulate pathtracing with just a really bright ambient object as 
my light source. Never got anywhere... Nothing but black. But this looks 
like a good idea. Maybe someone needs to make a patch. I'd give it a try if 
I had the patience...

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