This is an experiment for a larger picture I'm construction.  It shows a
translucent wax candle.  Getting the wax to "glow" without being transparent
is amazingly difficult.   Comments and suggestions welcomed.

JFMILLER

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jfmiller wrote:
> This is an experiment for a larger picture I'm construction.  It shows a
> translucent wax candle.  Getting the wax to "glow" without being transparent
> is amazingly difficult.   Comments and suggestions welcomed.

How did you do this? Sub-surface scattering or regular textures? It's a 
bit tough to judge without the flame, but to me the gradient seems a bit 
too sharp where it goes from light to dark. My spontaneous reaction is 
that it should be smoother, or maybe that the light part should be shorter.

/ martin

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"Martin Magnusson" <lov### [at] frustratedhousewiveszzncom> wrote in message
news:3DE### [at] frustratedhousewiveszzncom...
>
>
> jfmiller wrote:
> > This is an experiment for a larger picture I'm construction.  It shows a
> > translucent wax candle.  Getting the wax to "glow" without being
transparent
> > is amazingly difficult.   Comments and suggestions welcomed.
>
> How did you do this? Sub-surface scattering or regular textures? It's a
> bit tough to judge without the flame, but to me the gradient seems a bit
> too sharp where it goes from light to dark. My spontaneous reaction is
> that it should be smoother, or maybe that the light part should be
shorter.
>
> / martin
>

This is more a problem with the "quick-n-dirty" modle I used.  Ther is only
one point lightsource in the seen and as you pointed out no flame.  I was
mor interested in the translucent wax effect.

I tried to use subsurface scattering but it didn't come out right.  By the
time I made the media dence enough to not be transparent I also succeeded in
blocking all the light.

JFMILLER

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On Tue, 3 Dec 2002 22:53:16 -0800, "jfmiller" <jfm### [at] hotmailcom>
wrote:

>I tried to use subsurface scattering but it didn't come out right.  By the
>time I made the media dence enough to not be transparent I also succeeded in
>blocking all the light.

<shameless plug>

Perhaps this can help?

http://news.povray.org/povray.binaries.images/28847/?mtop=204509&moff=10


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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I think the edge is just right. I've seen such sharp edges in real candles.

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Thanks for the reference.  I had read your post before starting this project
and it is what gave me the idea.  I missed the part about interior_texture
though so I couldn't get it to work.

The solution shown here is kind of the invers of sub-surface scattering.
There is a transparent outer shell that contains an absorbtion media (white
at the moment) the iner shell is the same object with an opaque,
double_illumnate, no_shadow texture, and brilliance turned down to 0.05.

I'll go back and fiddle with the modle after finals are over and see if I
can get it to work.

Thanks
JFMILLER

"Peter Popov" <pet### [at] vipbg> wrote in message
news:s6cruus5lb1e4p98hhutinacno69uv8i4h@4ax.com...
> On Tue, 3 Dec 2002 22:53:16 -0800, "jfmiller" <jfm### [at] hotmailcom>
> wrote:
>
> >I tried to use subsurface scattering but it didn't come out right.  By
the
> >time I made the media dence enough to not be transparent I also succeeded
in
> >blocking all the light.
>
> <shameless plug>
>
> Perhaps this can help?
>
> http://news.povray.org/povray.binaries.images/28847/?mtop=204509&moff=10
>
>
> Peter Popov ICQ : 15002700
> Personal e-mail : pet### [at] vipbg
> TAG      e-mail : pet### [at] tagpovrayorg

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Nice picture! The translucency is convincing, but
the evenness of the light through the was isn't (to me).
Also, Ithink the melting is too uniform. Wax is kind-of
shiny and I don't see that in the rear opening of the
melted depression, of course no flame yet so
maybe that will come with it? Good lighting!
Have a great day!
=Bob=

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Dont even go there, I for one remeber the last great candle surge :)

(nice image btw)

--

Rick

Kitty5 NewMedia http://Kitty5.co.uk
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Ok, heres the real next version.  For those of you would cauget the last one
before it was canceled I appologize.

I reduced the wall height for the "melt zone" and made the
bottom more curved to remove the sharp line.  In addation,  I added some
'ior' top the shell which aslo softened the transition.  Other then that, I
added a wick (not visible) and flame and changed the camera angle.  I also
adjusted the media density a bit.

Comments; suggestions?

JFMILLER

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Attachments:
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jfmiller wrote:
> Ok, heres the real next version.  For those of you would cauget the last one
> before it was canceled I appologize.
> Comments; suggestions?

*gyaahhhhhh* *drool*

Can I peek at your source?

-- 
Tim Cook
http://empyrean.scifi-fantasy.com

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