Triple_R, thanks for the input!  I'll play around with that and see what
happens.  It seems like there would be a simple way to create this -- maybe
differencing this sphere with one that's marginally smaller would work.


Zeger, I've read the manual and, in fact, am using 'hollow' precisely because
there's fog in the scene.




"triple_r" <rre### [at] hotmailcom> wrote:
> "thisroad" <nomail@nomail> wrote:
>
> > When I run this, it appears that the sphere is always treated like a solid
> > object -- I can get the cylinder inside the sphere, or outside if I use
> > "inverse", but not the true intersection points.  Deleting "hollow" doesn't
> > change the behavior.  What should I do differently?
>
>
> What about this?
>
> sphere{<0,0,0>,4
>   clipped_by{
>      cylinder{PStart,PEnd,0.5}
>   }
>   pigment{rgb y}
> }
> ......
>
>  - Ricky







"Zeger Knaepen" <zeg### [at] povplacecom> wrote:
> read the manual, hollow only has meaning if you're using media or fog
>
> why is that keyword so hard to understand? seems like every beginner gets it
> wrong.
>
> Maybe for POV-Ray 4 it should be replaced by something more self-explaining,
> something like "atmosphere on" or so, dunno
>
> cu!
> --
> #macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
> sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
> #end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
> _(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com

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