Hello,
How can i render a scene with white background on which the shadow of a
object drops?
I thought of a plane, but it becomes darker to the horizon, but i what i
want is a pure white background.
To understand what I mean, here an example of a scene by sombody else:
http://www.oyonale.com/ressources/images/gt_globe.jpg

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JK wrote:


> To understand what I mean, here an example of a scene by sombody else:
> http://www.oyonale.com/ressources/images/gt_globe.jpg

That's what you get with a diffuse 1 white plane, a skysphere with a
gradient from white to light blue, a far lightsource and radiosity turned
on.

--
Jonathan.

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JK wrote:
> Hello,
> How can i render a scene with white background on which the shadow of a
> object drops?
> I thought of a plane, but it becomes darker to the horizon, but i what i
> want is a pure white background.
> To understand what I mean, here an example of a scene by sombody else:
> http://www.oyonale.com/ressources/images/gt_globe.jpg
> 
	You can get this kind of effect by playing with the "brilliance"
setting I think.

		Jerome
- --
+------------------------- Jerome M. BERGER ---------------------+
|    mailto:jeb### [at] freefr      | ICQ:    238062172            |
|    http://jeberger.free.fr/     | Jabber: jeb### [at] jabberfr   |
+---------------------------------+------------------------------+
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JRG <j.g### [at] NOSPAMtiscaliit> wrote:
> JK wrote:
>
>
> > To understand what I mean, here an example of a scene by sombody else:
> > http://www.oyonale.com/ressources/images/gt_globe.jpg
>
> That's what you get with a diffuse 1 white plane, a skysphere with a
> gradient from white to light blue, a far lightsource and radiosity turned
> on.
>
> --
> Jonathan.

No way to get to a result without radiosity? I don't like it because it
takes sooo long.

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web.45143e85ae94cde45f3b75cb0@news.povray.org...
> JRG <j.g### [at] NOSPAMtiscaliit> wrote:
>>
> No way to get to a result without radiosity? I don't like it because it
> takes sooo long.
>
>
If you want to trace images which look like Gilles Tran's , you've got to
get veeery patient :-)

Marc

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=?ISO-8859-1?Q?=22J=E9r=F4me_M=2E_Berger=22?= <jeb### [at] freefr> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> JK wrote:
> > Hello,
> > How can i render a scene with white background on which the shadow of a
> > object drops?
> > I thought of a plane, but it becomes darker to the horizon, but i what i
> > want is a pure white background.
> > To understand what I mean, here an example of a scene by sombody else:
> > http://www.oyonale.com/ressources/images/gt_globe.jpg
> >
>  You can get this kind of effect by playing with the "brilliance"
> setting I think.
Thanks for your tip, brilliance of 0 did the job.

plane{
 y, 0
 pigment{rgb 1}
 finish{
  diffuse 1
  brilliance 0
 }
}

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> plane{
>  y, 0
>  pigment{rgb 1}
>  finish{
>   diffuse 1
>   brilliance 0
>  }
> }

Did this really give you a solid white background with objects casting 
shadows on it?
  I've got win Pov3.6 and it didn't work for me.

This is what I have to use

//area light
light_source{<10,20,10> color White area_light x*8,y*8,4,4}

//background
plane{y,0 pigment{White*3}}
cylinder{-y,y*50,20 pigment{White} finish{ambient 1} hollow}

//object to show
cylinder{0,y*2,.5 pigment{Red}}

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Leroy <lrw### [at] joplincom> wrote:
> > plane{
> >  y, 0
> >  pigment{rgb 1}
> >  finish{
> >   diffuse 1
> >   brilliance 0
> >  }
> > }
>
> Did this really give you a solid white background with objects casting
> shadows on it?
>   I've got win Pov3.6 and it didn't work for me.
>
> This is what I have to use
>
> //area light
> light_source{<10,20,10> color White area_light x*8,y*8,4,4}
>
> //background
> plane{y,0 pigment{White*3}}
> cylinder{-y,y*50,20 pigment{White} finish{ambient 1} hollow}
>
> //object to show
> cylinder{0,y*2,.5 pigment{Red}}

You forgot the finish on the plane. With it and a camera positioned right it
works for me.

plane{y,0 pigment{rgb 1}
 finish { brilliance 0 diffuse 1}
}

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> No way to get to a result without radiosity? I don't like it because it
> takes sooo long.

What does work more or less is to increase the diffuse value above 1.0
until the plane gets the maximum brightness with the current light/camera
positions. Though this is a little dirty hack and does not work too well
with animations.
I've used this for the 'Glaserde' image in p.b.images.

Sebastian

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>  finish{
>   diffuse 1
>   brilliance 0
>  }

I think you want "ambient 0" also, unless you've already set that as the
#default.

 - Slime
 [ http://www.slimeland.com/ ]

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