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i forgot how to make a sphere get diff color as it goes out from the
center? how do i do it again? (without media density)
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Noah A wrote:
>
> i forgot how to make a sphere get diff color as it goes out from the
> center? how do i do it again? (without media density)
A spherical pattern ?
--
Ken Tyler
See my 700+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html
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yes ken thats it... how? won't it just look like it's a blend of all the
colors not a gradient?
Ken wrote:
> Noah A wrote:
> >
> > i forgot how to make a sphere get diff color as it goes out from the
> > center? how do i do it again? (without media density)
>
> A spherical pattern ?
>
> --
> Ken Tyler
>
> See my 700+ Povray and 3D Rendering and Raytracing Links at:
> http://home.pacbell.net/tylereng/index.html
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'onion' was the common pattern for concentric spheres or circles
before v3.1 (frequency or scale needed to apply to anything other than
a 1 unit radius).
You will not actually see any gradation of a color_map used on a
sphere however unless it is CSG'd with another object, ie cut in half
with a plane.
Bob
Ken <tyl### [at] pacbell net> wrote in message
news:37B62AF5.A20758BF@pacbell.net...
>
>
> Noah A wrote:
> >
> > i forgot how to make a sphere get diff color as it goes out from
the
> > center? how do i do it again? (without media density)
>
> A spherical pattern ?
>
> --
> Ken Tyler
>
> See my 700+ Povray and 3D Rendering and Raytracing Links at:
> http://home.pacbell.net/tylereng/index.html
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>You will not actually see any gradation of a color_map used on a
sphere however unless it is CSG'd with another object, ie cut in half
with a plane.<
Yes, and then you will only see it if the plane has the same texture.
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>won't it just look like it's a blend of all the colors not a gradient?<
Objects in POV are not really solid, they are made of an infinitely thin
mathematical surface. The color of the surface depends on the color of
the pigment *at that point*(temporarily forgetting about transparency,
reflection, etc). If a spherical pattern is used on a plain sphere, you
will see a sphere with a color the same as the last color in the
color_map. If you cut it in half with a plane, and texture the cutting
plane with the same texture as the sphere, you will see a half-sphere(a
hemisphere) and the gradient from the center outward on the cut side.
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Chris Huff wrote:
>
> >You will not actually see any gradation of a color_map used on a
> sphere however unless it is CSG'd with another object, ie cut in half
> with a plane.<
>
> Yes, and then you will only see it if the plane has the same texture.
...or your sphere is transparent.
--
Ken Tyler
See my 700+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html
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Ken wrote:
>
> Chris Huff wrote:
> >
> > >You will not actually see any gradation of a color_map used on a
> > sphere however unless it is CSG'd with another object, ie cut in half
> > with a plane.<
> >
> > Yes, and then you will only see it if the plane has the same texture.
>
> ...or your sphere is transparent.
>
> --
> Ken Tyler
>
> See my 700+ Povray and 3D Rendering and Raytracing Links at:
> http://home.pacbell.net/tylereng/index.html
...or the texture on the sphere has turbulence.
That's the way I do planets - sphere, onion, turbulence.
Cheers, PoD.
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PoD wrote:
>
> Ken wrote:
> >
> > Chris Huff wrote:
> > >
> > > >You will not actually see any gradation of a color_map used on a
> > > sphere however unless it is CSG'd with another object, ie cut in half
> > > with a plane.<
> > >
> > > Yes, and then you will only see it if the plane has the same texture.
> >
> > ...or your sphere is transparent.
> >
> > --
> > Ken Tyler
> >
> > See my 700+ Povray and 3D Rendering and Raytracing Links at:
> > http://home.pacbell.net/tylereng/index.html
>
> ...or the texture on the sphere has turbulence.
> That's the way I do planets - sphere, onion, turbulence.
>
> Cheers, PoD.
... or the texture is translated to some point from the origin or...
--
Ken Tyler
See my 700+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html
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On Tue, 17 Aug 1999 15:15:04 -0700, Ken <tyl### [at] pacbellnet> wrote:
>
>
>PoD wrote:
>>
>> Ken wrote:
>> >
>> > Chris Huff wrote:
>> > >
>> > > >You will not actually see any gradation of a color_map used on a
>> > > sphere however unless it is CSG'd with another object, ie cut in half
>> > > with a plane.<
>> > >
>> > > Yes, and then you will only see it if the plane has the same texture.
>> >
>> > ...or your sphere is transparent.
>> >
>> > --
>> > Ken Tyler
>> >
>> > See my 700+ Povray and 3D Rendering and Raytracing Links at:
>> > http://home.pacbell.net/tylereng/index.html
>>
>> ...or the texture on the sphere has turbulence.
>> That's the way I do planets - sphere, onion, turbulence.
>>
>> Cheers, PoD.
>
>... or the texture is translated to some point from the origin or...
>
the texture is applied *after* the CSG, or...
Cheers,
Cliff Bowman
Why not pay my 3D Dr Who site a visit at http://www.who3d.cwc.net/
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