Sorry, I come back..

Actually, filling my object is easier than making it empty..

To make it empty, I tried to clip my height_object with a sphere with a value of
transmit equal to 1.

But I can still see the sphere contours even if they're smoothened.

Maybe I didn't use the transmit keyword the right way?


Here is the code:
intersection {
height_field {
        png
        "IN\PNG\dem.png"
        smooth

        texture{
        pigment {
        White
        }

        finish {
        ambient 0.1
        diffuse 0.55
        }
        }

        translate <-0.5,0,-0.48>
        scale <14,4,14>
}

sphere {
  <0, 1, 0>
  5
  pigment {
  White
  transmit 1
  }
  hollow on
}
}

"mathieu_r" <nomail@nomail> wrote:
> Nice! Thanks. It works!
>
> clipka <ano### [at] anonymousorg> wrote:
> > Am 29.08.2012 15:09, schrieb mathieu_r:
> > > Ok, so Intersection seems the right way to do it.
> > >
> > > I have another question:
> > >
> > > I've intersected my height_field with my box. Ok but between my height_field and
> > > the bottom of my box there is an empty gap. How to fill it? You know, like city
> > > models
> > >
> > > If possible with the same texture as the height_field object.
> >
> > Intersect the height field with a slightly smaller box; i.e, instead of:
> >
> >    height_field {
> >      ...
> >      texture { ... }
> >      translate ... scale ... rotate ...
> >    }
> >
> > use the following:
> >
> >    intersection {
> >      height_field { ... }
> >      box { <0.0001, 0.0001, 0.0001>, <0.9999, 1.0001, 0.9999> }
> >      texture { ... }
> >      translate ... scale ... rotate ...
> >    }
> >
> > This works due to some inconsistency of the height_field object:
> > Although it lacks a visible bottom and sides, it is nonetheless
> > considered to be filling the entire space below the surface; so if you
> > cut off its "non-sides" and "non-bottom", you'll get visible surfaces at
> > the cuts.

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