I'm getting a missing picture link (question mark) and I'm using Netscape 4.5, so HTML
isn'tthe
problem. Try attaching the image instead

Josh

Ken wrote:

> Steve wrote:
> >
> > This is going to be part of a larger scene.  The abbacus looks better by itself
just as a close
> > up.
> >
> > I had some major problems with the chips, because I wasn't sure on what
orientation I was going
> > to want them to have I made the whole object, used a cylinder on each face of the
chip in a
> > difference to give the indented effect and to put the chequered pattern in the
middle of the
> > chip.  I decided that I wanted to be able to see the original colour of the chip
through the
> > chequered pattern so filtered the pigments that made up the chequered pattern and
hey presto, a
> > disaster.  When I do this you can see right through the chip, as though there is
none of the
> > original material in the object between the chequered patterns on each side of the
chip.
> >
> > Any suggestions?
> >
> > Steve[Image]
>
>   Something is wrong with your post I'm afraid. The image did not appear
> and I presume you used html instead of plain text. A lot of people here
> have problems with html so you might try plain text in these groups.
>
>   Anyway there are two ways of using a clear or semitransparent pigment.
> The first method is to use them to make clear areas in an object like if
> you had a candy cane but one stripe is solid red and the other is clear
> like glass. You would see through the object where the clear area is.
> If you apply a clear pigment over a solid pigment it will apply the
> attributes of the clear pigment to the layer below it.
>
>   For example:
>
> sphere{
>  texture{
>   pigment{Red}
>   pigment{rgbf<1,1,1,.5} // White filtered by 0.5
>  }
> }
>
> That will give you unfortunatly a semi-clear sphere the red not showing
> much and the White not very visible either.
>
> To get around that you need to use two texture statements each
> with it's own pigment like this example using the above pigments:
>
> sphere{
>   texture{
>    pigment{Red}
>   }
>
>  texture{
>   pigment{rgbf<1,1,1,.5}
>  }
> }
>
> This example will add kind of a haze to the red texture above but the
> red will be very visible regardless. This is the way that all of the
> fancy multilayered textures work. You just have to remember to apply
> transperent pigment layers as seperate textures and not applied dirrctly
> over each other or they will add thear filter value to the layer below it.
>
> It's also ok to declare a texture with two or more texture statements.
>
> #declare Mytex=
>   texture{pigment{Red}}
>   texture{pigment{rgbf .7}}
>   texture{pigment{rgbf .8}}
>   texture{pigment{rgbf .9}}
>
> Even though there are four textures there when you use Mytex
> Pov will treat it as one texture.
>
> If you made all of the layers of Mytex with some filter amount you
> could even use more than one layer of the texture Mytex on itself.
>
>  sphere{
>    texture{Mytex scale 0.5}
>    texture{Mytex scale 1.5 rotate 90*y}
>  }
>
> --
> Ken Tyler
>
> mailto://tylereng@pacbell.net

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