Here is a quick try with low radiosity settings and a first attempt to the
material of the box. Needs tuning and improvements, especially a density
function for the media in order to give granularity, and the normal also
needs to be re-worked.

The scene is lit by a 2-color dome (Yellow/Blue which combine into Gray with
radiosity), and the media box is lit by 2 sets of 50 randomly positionned
light_sources (Yellow on the left, Blue on the right) within a light_group.
The circle of small balls is just decoration.

I intend to get an acceptable translucent Wax material. Here, the lighting
is not suitable to show translucency.

Bruno

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Attachments:
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Preview of image 'mediarad.png'

My last experiment.

Regards.

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Attachments:
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Preview of image 'mediarad.jpg'

Bruno Cabasson nous apporta ses lumieres en ce 2007/09/13 09:34:
> My last experiment.
> 
> Regards.
> 
> 
> ------------------------------------------------------------------------
> 
Nice waxy cube.

-- 
Alain
-------------------------------------------------
Q: If pro is opposite of con,then what is the opposite of progress?

A: Congress!
Men's restroom, House of Representatives, Washington , DC

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"Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> wrote:
> My last experiment.
>

Really nice. Looks like wax to me!  Best wax cube I've seen...not that I've
seen that many of 'em.  ;-)

The only jarring part of the image is the red sphere; just seems out of
place (visually speaking.)  Draws too much attention to itself.

Mind posting your final "wax" code? It's quite impressive.

Ken W.

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"Kenneth" <kdw### [at] earthlinknet> wrote:
> "Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> wrote:
> > My last experiment.
> >
>
> Really nice. Looks like wax to me!  Best wax cube I've seen...not that I've
> seen that many of 'em.  ;-)
>
> The only jarring part of the image is the red sphere; just seems out of
> place (visually speaking.)  Draws too much attention to itself.
>
> Mind posting your final "wax" code? It's quite impressive.
>
> Ken W.

This scene is just an exercise.

The red sphere represents a red light source. The scene is lit by a big
2-color dome (green & blue) by radiosity, and by the red light_source (all
3 primary colors). The wax is made with scaterring/absorption media with a
density function.

I'll post the code.

    Regards

        Bruno

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"Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> wrote:
> The red sphere represents a red light source. The scene is lit by a big
> 2-color dome (green & blue) by radiosity, and by the red light_source (all
> 3 primary colors). The wax is made with scaterring/absorption media with a
> density function.
>
> I'll post the code.
>
>     Regards
>
>         Bruno

I forgot to say the most important: as radiosity does not illuminate
scattering media, I faked -as suggested before - by using many light
sources of the appropriate color, in a light_group with the box.

    Bruno

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"Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> wrote:
         Bruno
>
> I forgot to say the most important: as radiosity does not illuminate
> scattering media, I faked -as suggested before - by using many light
> sources of the appropriate color, in a light_group with the box.
>

Also, media doesn't illuminate other media (or itself) when using radiosity.
This was never clear--or even mentioned?--in the POV documentation.

KW

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"Kenneth" <kdw### [at] earthlinknet> wrote:
> "Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> wrote:
>          Bruno
> >
> > I forgot to say the most important: as radiosity does not illuminate
> > scattering media, I faked -as suggested before - by using many light
> > sources of the appropriate color, in a light_group with the box.
> >
>
> Also, media doesn't illuminate other media (or itself) when using radiosity.
> This was never clear--or even mentioned?--in the POV documentation.
>
> KW

Yes. In another thread, we are talking about a new SDL for POV. Perhaps 'we'
could not only add some features to the langage itself, but take the
occasion to also add some features as a ray-tracer. But it's all a LOT of
work, and maybe 'we' could manage this project like those in the industry,
whether or not it can be all/partly open-source'd.

There are some reliable people here who are obviously accustomed to large
developments in the industry and who know about methodology, and who are
likely to volunteer to help lead/contribute this projet.

Anyway, thanks to the POV team to be still present after quite a while.

    Bruno

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"Kenneth" <kdw### [at] earthlinknet> wrote:
> "Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> wrote:
> > My last experiment.
> >
>
> Really nice. Looks like wax to me!  Best wax cube I've seen...not that I've
> seen that many of 'em.  ;-)
>
> The only jarring part of the image is the red sphere; just seems out of
> place (visually speaking.)  Draws too much attention to itself.
>
> Mind posting your final "wax" code? It's quite impressive.
>
> Ken W.

I posted the code in p.b.s-f

    Bruno

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"Bruno Cabasson" <bru### [at] alcatelaleniaspacefr> wrote:
> "Kenneth" <kdw### [at] earthlinknet> wrote:

> > Also, media doesn't illuminate other media (or itself) when using radiosity.
> > This was never clear--or even mentioned?--in the POV documentation.
> >

>
> Yes. In another thread, we are talking about a new SDL for POV. Perhaps 'we'
> could not only add some features to the langage itself, but take the
> occasion to also add some features as a ray-tracer.

I read that post with great interest. Not being a real programmer (as in
C++, etc.) I would certainly like to help anyway, with updating/clarifying
the POV documentation. I was a technical writer at one time, so I have
*some* skill at such things... :-) I would assume that there are many of
'us' out here who would love to contribute in some way to strengthening
and furthering this great program.

Cheers!

KW

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