I tried this code, just added a light and a camera and a background and it gave me a
bunch of
red sheres... perhaps 3.1 fixed whatever caused the original problem?

Josh English
eng### [at] spiritonecom


Spider wrote:

> Another one in the same style
> Here I'll declare some objects(This is untested, but I've had bad experiences with
this)
>
> try :
> #declare Sphere1 =
> union {
>   #local N = 50;
>   #while(N>0)
>     #local N = N -1;
>     sphere { <0,0,N>,.4 }
>   #end
> }
> #declare Sphere2 =
> union {
>   #local N = 50;
>   #while(N>0)
>     #local N = N -1;
>     object { Sphere1 translate <N,0,0> }
>   #end
> }
>
> #declare Sphere3 =
> union {
>   #local N = 50;
>   #while(N>0)
>     #local N = N -1;
>     object { Sphere2 translate <0,N,0> }
>   #end
>   pigment { colour rgb <1,0,0> }
> }
>
> This results in several Black spheres, why ?
>
> As I said, I'm not very sure of this case, but others I've met are like that, that
several
> unions withing eachother doesn't get a texture added..
>
> //Spider
>
> Ken wrote:
> >
> > If I have an object constructed using a CSG operation I get
> > two different results in the rendered object if I apply the
> > pigment and interior properties to the different pieces
> > versus the CSG as a single object ( see example ).
> > The difference is quite visible.
> >
> > Why ?
> >
> >  intersection{
> >    cylinder{x*-3,x*3,1
> >     pigment{rgbf<1,.7,.7,1>}
> >      interior{ior 1.95}
> >   }
> >
> >   plane{-z,-0
> >    pigment{rgbf<1,.7,.7,1>}
> >     interior{ior 1.95}
> >   }
> >  }
> >
> > vs.
> >
> >  intersection{
> >
> >  cylinder{x*-3,x*3,1}
> >
> >  plane{-z,-0}
> >
> >   pigment{rgbf<1,.7,.7,1>}
> >    interior{ior 1.95}
> >  }
> >
> > --
> > Ken Tyler
> >
> > tyl### [at] pacbellnet

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