hi marabou,

i would say that the easiest option is to tug on some of the
control points of your patch to difference the box.  does
that make sense?

good luck, miker


"marabou" <not### [at] availableyet> wrote in message
news:3bfc0381@news.povray.org...
> MR wrote:
>
> > hi marabou,
> >
> > hey!  thats one i can answer!  difference is a constructive
> > solid geometry option, and that only works with "primitive"
> > shapes, such as cylinders, boxes, spheres, etc.  all of those
> > shapes except the donut (toroid) are listed in the scene
> > language help document in section 2.2.
> >
> > good luck, miker
>
> miker, i fear you are right. and this confirms my results. yes. hm. smack.
> but how to come by this problem? is there another possibility?
> thanks for the hint!
>
> >
> >
> > "marabou" <not### [at] availableyet> wrote in message
> > news:3bfbf8ed@news.povray.org...
> >>
> >> hello,
> >> i made a shape with bicubic_patch and failed as i tried to difference
it
> >> from a box:
> >>
> >> difference{
> >> box{<0,0,0>,<1,1,1> pigment{color Green}}
> >> object{
> >>         a_bicubic_object
> >> }
> >> }//difference
> >>
> >> the result was an empty scene.
> >> is there any way to come by this problem?
> >>
> >>
>

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