Hi. I've got this difference object:

difference {   // a cylinder subtracted with another cylinder with smaller
radius -> a ring

        cylinder {
          <5, 0, 5>,
          <5, 1, 5>,
          1
          pigment { rgb <1, 0, 0> }
        }

       cylinder {
          <5, 0, 5>,
          <5, 1, 5>,
          0.9
          open
       }
    //scale <2,1,1>   is this the right place to insert the scaling?

}

if i try to scale it in x- or z- direction, the object simply fails to show
in the render. scaling i y-direction however, works fine.

why is this?

-greets,
    lars petter

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