On Fri, 12 Apr 2002 23:01:39 +1000, "Chris Colefax"
<chr### [at] tagpovrayorg> wrote:
> I also want to build in more sun-lighting features, and
> possibly combine the cloud generation with other related effects...

Don't forget timezones support like:
http://news.povray.org/5r0q0uoe2d1leap6ngfll9a2b4dg90a2j3%404ax.com
;-)

ABX

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WOW ...Very very impressive ....
Gimme the code please

--
Luis


****************************************************
Lightning Generator
http://lightning.generator.free.fr
http://LG666.ifrance.com
Chan IRC sur eu.undernet.org : #povray-fr
****************************************************

news: 3cb6daa9@news.povray.org...
> Another example, and some answers:
>
> As many deduced, and Gilles illustrated, the clouds are POV-Ray pigments
> billboarded onto semi-transparent objects.  And, as Gilles pointed out, I
> first posted an example of this back in Sep 2000 (see
> http://news.povray.org/povray.binaries.images/12959/).
>
> I recently sat down with 3.5, though, and attacked the idea again with all
> of the new features available.  However, after trying various pattern
> functions I discovered my original 3.1 code gave faster, more attractive
> results.  These last two postings, then, don't use any 3.5 features - no
> function patterns or otherwise.
>
> From my experiments, I would say the technique is best for creating
cumulus
> clouds - i.e. puffy, medium height "cotton wool" clouds.  The hard edges
in
> the last post, and the depth of fog, basically replicate what I see when I
> look outside my window every day!  Of course, it's very easy to soften the
> cloud textures, and to reduce the amount of fog.  Because the clouds are
> individual objects, you can have complete control over their placement in
a
> scene, and they are focal-blur compatible.  I've also created various
> animations, flying from below to above the clouds, through the clouds,
> around the clouds, etc., and the results are reasonably effective.
>
> Now the downsides - because the clouds are flat objects and designed to
look
> best from the camera's viewpoint, there can be problems with reflections
and
> shadowing.  I am working on solutions for this, which I don't think should
> be too difficult.  I also want to build in more sun-lighting features, and
> possibly combine the cloud generation with other related effects...
>
>
>

Post a reply to this message

Your clouds are incredible. Is fire next?

 -Shay

Chris Colefax <chr### [at] tagpovrayorg> wrote in message
news:3cb6daa9@news.povray.org...

Post a reply to this message

Very nicely done.

> Now the downsides - because the clouds are flat objects and designed to
look
> best from the camera's viewpoint, there can be problems with reflections
and
> shadowing.  I am working on solutions for this, which I don't think should
> be too difficult.  I also want to build in more sun-lighting features, and
> possibly combine the cloud generation with other related effects...

Shadows are easy enough; give the clouds no_shadow and then make a
horizontally flat disk with a black, partially transparent pigment on it,
and give it no_image and no_reflection.

--
- Slime
[ http://www.slimeland.com/ ]
[ http://www.slimeland.com/images/ ]
"Chris Colefax" <chr### [at] tagpovrayorg> wrote in message
news:3cb6daa9@news.povray.org...
> Another example, and some answers:
>
> As many deduced, and Gilles illustrated, the clouds are POV-Ray pigments
> billboarded onto semi-transparent objects.  And, as Gilles pointed out, I
> first posted an example of this back in Sep 2000 (see
> http://news.povray.org/povray.binaries.images/12959/).
>
> I recently sat down with 3.5, though, and attacked the idea again with all
> of the new features available.  However, after trying various pattern
> functions I discovered my original 3.1 code gave faster, more attractive
> results.  These last two postings, then, don't use any 3.5 features - no
> function patterns or otherwise.
>
> From my experiments, I would say the technique is best for creating
cumulus
> clouds - i.e. puffy, medium height "cotton wool" clouds.  The hard edges
in
> the last post, and the depth of fog, basically replicate what I see when I
> look outside my window every day!  Of course, it's very easy to soften the
> cloud textures, and to reduce the amount of fog.  Because the clouds are
> individual objects, you can have complete control over their placement in
a
> scene, and they are focal-blur compatible.  I've also created various
> animations, flying from below to above the clouds, through the clouds,
> around the clouds, etc., and the results are reasonably effective.
>
> Now the downsides - because the clouds are flat objects and designed to
look
> best from the camera's viewpoint, there can be problems with reflections
and
> shadowing.  I am working on solutions for this, which I don't think should
> be too difficult.  I also want to build in more sun-lighting features, and
> possibly combine the cloud generation with other related effects...
>
>
>

Post a reply to this message

I was thinking maybe that you could add a box that lies on the x-z plane for
each cloud, behind the box that makes the part that faces the viewer. Like a
slice of the texture at that point of the cloud. This would cast shadows.
Would that work, you think?

Beautiful render, btw.

Post a reply to this message

Have you not seen the candle flame on his website? :)

Post a reply to this message

"Tony[B]" <ben### [at] catholicorg> wrote in message
news:3cb7254a@news.povray.org...
> I was thinking maybe that you could add a box that lies on the x-z plane
for
> each cloud, behind the box that makes the part that faces the viewer. Like
a
> slice of the texture at that point of the cloud. This would cast shadows.
> Would that work, you think?

    I was going to suggest something similar, but I assumed he had already
thought of it. I suspect that his planes are set up to face the camera, he
could make another no-image plane like it that faces the "Sun"...

Post a reply to this message

Chris:

  I'll volunteer to do a Morray plug in for your macro ...

                  == John ==

"Chris Colefax" <chr### [at] tagpovrayorg> wrote in message
news:3cb6daa9@news.povray.org...
> Another example, and some answers:
>
> As many deduced, and Gilles illustrated, the clouds are POV-Ray pigments
> billboarded onto semi-transparent objects.  And, as Gilles pointed out, I
> first posted an example of this back in Sep 2000 (see
> http://news.povray.org/povray.binaries.images/12959/).
>
> I recently sat down with 3.5, though, and attacked the idea again with all
> of the new features available.  However, after trying various pattern
> functions I discovered my original 3.1 code gave faster, more attractive
> results.  These last two postings, then, don't use any 3.5 features - no
> function patterns or otherwise.
>
> From my experiments, I would say the technique is best for creating
cumulus
> clouds - i.e. puffy, medium height "cotton wool" clouds.  The hard edges
in
> the last post, and the depth of fog, basically replicate what I see when I
> look outside my window every day!  Of course, it's very easy to soften the
> cloud textures, and to reduce the amount of fog.  Because the clouds are
> individual objects, you can have complete control over their placement in
a
> scene, and they are focal-blur compatible.  I've also created various
> animations, flying from below to above the clouds, through the clouds,
> around the clouds, etc., and the results are reasonably effective.
>
> Now the downsides - because the clouds are flat objects and designed to
look
> best from the camera's viewpoint, there can be problems with reflections
and
> shadowing.  I am working on solutions for this, which I don't think should
> be too difficult.  I also want to build in more sun-lighting features, and
> possibly combine the cloud generation with other related effects...
>
>
>

Post a reply to this message

Nice idea !!!

--
Luis


****************************************************
Lightning Generator
http://lightning.generator.free.fr
http://LG666.ifrance.com
Chan IRC sur eu.undernet.org : #povray-fr
****************************************************

3cc195e1$1@news.povray.org...
> Chris:
>
>   I'll volunteer to do a Morray plug in for your macro ...
>
>                   == John ==
>
> "Chris Colefax" <chr### [at] tagpovrayorg> wrote in message
> news:3cb6daa9@news.povray.org...
> > Another example, and some answers:
> >
> > As many deduced, and Gilles illustrated, the clouds are POV-Ray pigments
> > billboarded onto semi-transparent objects.  And, as Gilles pointed out,
I
> > first posted an example of this back in Sep 2000 (see
> > http://news.povray.org/povray.binaries.images/12959/).
> >
> > I recently sat down with 3.5, though, and attacked the idea again with
all
> > of the new features available.  However, after trying various pattern
> > functions I discovered my original 3.1 code gave faster, more attractive
> > results.  These last two postings, then, don't use any 3.5 features - no
> > function patterns or otherwise.
> >
> > From my experiments, I would say the technique is best for creating
> cumulus
> > clouds - i.e. puffy, medium height "cotton wool" clouds.  The hard edges
> in
> > the last post, and the depth of fog, basically replicate what I see when
I
> > look outside my window every day!  Of course, it's very easy to soften
the
> > cloud textures, and to reduce the amount of fog.  Because the clouds are
> > individual objects, you can have complete control over their placement
in
> a
> > scene, and they are focal-blur compatible.  I've also created various
> > animations, flying from below to above the clouds, through the clouds,
> > around the clouds, etc., and the results are reasonably effective.
> >
> > Now the downsides - because the clouds are flat objects and designed to
> look
> > best from the camera's viewpoint, there can be problems with reflections
> and
> > shadowing.  I am working on solutions for this, which I don't think
should
> > be too difficult.  I also want to build in more sun-lighting features,
and
> > possibly combine the cloud generation with other related effects...
> >
> >
> >
>
>

Post a reply to this message

Marc

3cc515eb@news.povray.org...
> Nice idea !!!
>
> --
> Luis
>

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