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This is a bonsai scene I have been playing with on and off for a while. I'd
like to add some media to create a slightly dusty/hazy look that would
highlight the light beams a little and maybe give the image a little extra
something. Any advice on how to create a media that would do that would be
appreciated.
Patrick Dugan
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Attachments:
Download 'Bonsai.jpg' (96 KB)
Preview of image 'Bonsai.jpg'
![Bonsai.jpg](/povray.binaries.images/attachment/%3C3dcb12c3%40news.povray.org%3E/Bonsai.jpg?preview=1)
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> This is a bonsai scene I have been playing with on and off for a while.
I'd
> like to add some media to create a slightly dusty/hazy look that would
> highlight the light beams a little and maybe give the image a little extra
> something. Any advice on how to create a media that would do that would
be
> appreciated.
Since you're using an area light, and area lights + media are a bad idea
when avoidable, I'd suggest this approach:
1. Put the entire scene you have right now (excluding the camera) into a
light_group.
2. Inside a separate light_group, create a plane whose surface coincides
with the backside of the bamboo wall. Make sure the tree and camera are
*inside* this plane. Make the plane hollow and transparent and give it an
interior something like
interior {
media {
scattering {2, .01}
// experiment with different scattering types (like type 1, or type 5 with
different eccentricity values)
// if the media is too heavy, lower the .01; if its too invisible, bring the
.01 up higher.
// if there's simply too much darkness for the lighting effects that are
created, then add "extinction .5" and fiddle with the .5 until it looks
good.
}
}
3. Put a light source identical to your area light inside this light_group,
but *don't make it an area light*. That way, the solid objects in the scene
will be lit with an area light, but the media will be lit with a point
light. This will speed up the render a *lot* and the difference probably
won't be noticeable.
- Slime
[ http://www.slimeland.com/ ]
Post a reply to this message
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In article <3dcb12c3@news.povray.org>,
"Patrick Dugan" <pat### [at] netins net> wrote:
> This is a bonsai scene I have been playing with on and off for a while. I'd
> like to add some media to create a slightly dusty/hazy look that would
> highlight the light beams a little and maybe give the image a little extra
> something. Any advice on how to create a media that would do that would be
> appreciated.
Nice...the bark and leaves look too brightly lit though, do they have a
high ambient?
Anyway, what you want is scattering media, without a density pattern,
and with a very dim scattering color. Type 4 (Rayleigh) scattering is
probably the best for this. If it is invisible, boost the scattering
amount, if everything is black or white, lower it.
--
Christopher James Huff <cja### [at] earthlink net>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tag povray org
http://tag.povray.org/
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>
> This is a bonsai scene I have been playing with on and off for a while.
I'd
> like to add some media to create a slightly dusty/hazy look that would
> highlight the light beams a little and maybe give the image a little extra
> something. Any advice on how to create a media that would do that would
be
> appreciated.
I have no advice to give (haven't played with scattering media)
but I wanted to say I like your bonsai a lot.
How it was made?.
Txemi Jendrix
http://www.txemijendrix.com
Post a reply to this message
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Thank you! The tree was created using Gilles Tran wonderful tree macro.
The rest was modeled within Povray by hand. The bamboo was made using SOR
objects.
"Txemi Jendrix" <tji### [at] euskalnet net> wrote in message
news:3dcb263e@news.povray.org...
3dcb12c3@news.povray.org...
> >
> > This is a bonsai scene I have been playing with on and off for a while.
> I'd
> > like to add some media to create a slightly dusty/hazy look that would
> > highlight the light beams a little and maybe give the image a little
extra
> > something. Any advice on how to create a media that would do that would
> be
> > appreciated.
>
> I have no advice to give (haven't played with scattering media)
> but I wanted to say I like your bonsai a lot.
> How it was made?.
>
> Txemi Jendrix
> http://www.txemijendrix.com
>
>
>
Post a reply to this message
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Okay, I'll show my stupidity here. If I use a plane that is parallel to the
back wall won't it be flat? How can the
tree and camera be inside it? I could see a box since it would "fill" the
scene but I don't understand using a plane.
"Slime" <slm### [at] slimeland com> wrote in message
news:3dcb1fc6$1@news.povray.org...
> > This is a bonsai scene I have been playing with on and off for a while.
> I'd
> > like to add some media to create a slightly dusty/hazy look that would
> > highlight the light beams a little and maybe give the image a little
extra
> > something. Any advice on how to create a media that would do that would
> be
> > appreciated.
>
> Since you're using an area light, and area lights + media are a bad idea
> when avoidable, I'd suggest this approach:
>
> 1. Put the entire scene you have right now (excluding the camera) into a
> light_group.
>
> 2. Inside a separate light_group, create a plane whose surface coincides
> with the backside of the bamboo wall. Make sure the tree and camera are
> *inside* this plane. Make the plane hollow and transparent and give it an
> interior something like
>
> interior {
> media {
> scattering {2, .01}
> // experiment with different scattering types (like type 1, or type 5 with
> different eccentricity values)
> // if the media is too heavy, lower the .01; if its too invisible, bring
the
> .01 up higher.
> // if there's simply too much darkness for the lighting effects that are
> created, then add "extinction .5" and fiddle with the .5 until it looks
> good.
> }
> }
>
> 3. Put a light source identical to your area light inside this
light_group,
> but *don't make it an area light*. That way, the solid objects in the
scene
> will be lit with an area light, but the media will be lit with a point
> light. This will speed up the render a *lot* and the difference probably
> won't be noticeable.
>
> - Slime
> [ http://www.slimeland.com/ ]
>
>
Post a reply to this message
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> Thank you! The tree was created using Gilles Tran wonderful tree macro.
> The rest was modeled within Povray by hand. The bamboo was made using SOR
> objects.
I wanted to update an image I made back in 1999, and I
think your bonsai has given me the final push.
Again, great image. Waiting to see the media version.
Bye
PS: Just if you are curious, this is the old image:
http://www.txemijendrix.com/imagpov/povpage/1.html
Txemi Jendrix
http://www.txemijendrix.com
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> Okay, I'll show my stupidity here. If I use a plane that is parallel to
the
> back wall won't it be flat? How can the
> tree and camera be inside it? I could see a box since it would "fill" the
> scene but I don't understand using a plane.
I think he means you'll have to create a plane and rotate it
so the +y axis of the plane points to the tree and camera.
Bye
Txemi Jendrix
http://www.txemijendrix.com
Post a reply to this message
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> Okay, I'll show my stupidity here. If I use a plane that is parallel to
the
> back wall won't it be flat? How can the
> tree and camera be inside it? I could see a box since it would "fill" the
> scene but I don't understand using a plane.
Planes have insides and outsides just like boxes or spheres. The
"underneath" part of a plane is considered to be "inside" it. So just make
sure the normal of the plane points *away* from the camera, so that the
camera is "underneath" it.
- Slime
[ http://www.slimeland.com/ ]
Post a reply to this message
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On Thu, 7 Nov 2002 19:25:26 -0600, "Patrick Dugan"
<pat### [at] netins net> wrote:
>This is a bonsai scene I have been playing with on and off for a while. I'd
>like to add some media to create a slightly dusty/hazy look that would
>highlight the light beams a little and maybe give the image a little extra
>something. Any advice on how to create a media that would do that would be
>appreciated.
Impressive! I can't wait to see it with media.
My only nit to pick is that the whole bonsai - even the leaves - seems
luxophobic. Shouldn't at least the leaves make some effort to point to
the light, instead of away from it?
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vip bg
TAG e-mail : pet### [at] tag povray org
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