If I were to apply a "wood" pattern texture to an object in Povray 3.02,
with a transparent color, I would be able to get a kind of banding on
the SURFACE only of the object.  The texture is applied only to the
surface.

In Povray 3.1, if I apply a wood pattern to the emitting media of an
object,  I get nice glowing pancakes, or, I get a "volumetric"
application of my texture.  But it glows in the dark and each pancake
slice is transparent.

Suppose I want non-transparent, non-glowing, volumetric "slice."  How is
this done in 3.1?

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Greg M. Johnson wrote:
> 
> If I were to apply a "wood" pattern texture to an object in Povray 3.02,
> with a transparent color, I would be able to get a kind of banding on
> the SURFACE only of the object.  The texture is applied only to the
> surface.
> 
> In Povray 3.1, if I apply a wood pattern to the emitting media of an
> object,  I get nice glowing pancakes, or, I get a "volumetric"
> application of my texture.  But it glows in the dark and each pancake
> slice is transparent.
> 
> Suppose I want non-transparent, non-glowing, volumetric "slice."  How is
> this done in 3.1?

I think the answer lies in the media type of which there are two -
emmiting and absorbing. If you don't want it to glow have it suck
light instead :)

-- 
Ken Tyler

tyl### [at] pacbellnet

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No, that won't do.

I want it to be able to react "diffusely" to normal light, not absorb certain
colors out of spotlights shone on it.

I want to use a transparent component in the wood texture to make the object
look like it is made out of, for want of a better word, "pancake slices."  I
want the pancakes to be dark on one side (like wood).

I want a "volumetric" application of exactly what a wood pigment pattern would
do to the surface of an object in povray 3.02!


Ken wrote:

> Greg M. Johnson wrote:
> >
> > If I were to apply a "wood" pattern texture to an object in Povray 3.02,
> > with a transparent color, I would be able to get a kind of banding on
> > the SURFACE only of the object.  The texture is applied only to the
> > surface.
> >
> > In Povray 3.1, if I apply a wood pattern to the emitting media of an
> > object,  I get nice glowing pancakes, or, I get a "volumetric"
> > application of my texture.  But it glows in the dark and each pancake
> > slice is transparent.
> >
> > Suppose I want non-transparent, non-glowing, volumetric "slice."  How is
> > this done in 3.1?
>
> I think the answer lies in the media type of which there are two -
> emmiting and absorbing. If you don't want it to glow have it suck
> light instead :)
>
> --
> Ken Tyler
>
> tyl### [at] pacbellnet

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Then I think you want a scattering media.  I describe how to hack
something like that using scattering and absorbtion at:

members.xoom.com/POVRAY3/media1.html

-Mike

Greg M. Johnson wrote:
> 
> No, that won't do.
> 
> I want it to be able to react "diffusely" to normal light, not absorb certain
> colors out of spotlights shone on it.
> 
> I want to use a transparent component in the wood texture to make the object
> look like it is made out of, for want of a better word, "pancake slices."  I
> want the pancakes to be dark on one side (like wood).
> 
> I want a "volumetric" application of exactly what a wood pigment pattern would
> do to the surface of an object in povray 3.02!
> 
> Ken wrote:
> 
> > Greg M. Johnson wrote:
> > >
> > > If I were to apply a "wood" pattern texture to an object in Povray 3.02,
> > > with a transparent color, I would be able to get a kind of banding on
> > > the SURFACE only of the object.  The texture is applied only to the
> > > surface.
> > >
> > > In Povray 3.1, if I apply a wood pattern to the emitting media of an
> > > object,  I get nice glowing pancakes, or, I get a "volumetric"
> > > application of my texture.  But it glows in the dark and each pancake
> > > slice is transparent.
> > >
> > > Suppose I want non-transparent, non-glowing, volumetric "slice."  How is
> > > this done in 3.1?
> >
> > I think the answer lies in the media type of which there are two -
> > emmiting and absorbing. If you don't want it to glow have it suck
> > light instead :)
> >
> > --
> > Ken Tyler
> >
> > tyl### [at] pacbellnet

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