Hi Mike,

I think you could use an isosurface like this:

#declare _thickness = 1.0;
#declare thickParaboloid =
  function { abs(pow(x,2) + pow(z,2) - y) - _thickness * 0.5}

isosurface {
  function { thickParaboloid(x,y,z) }
  max_gradient 15.0
  contained_by { box { -5, 5 } }
  texture { pigment { color rgb 1.0 } }
}

Or, you could approximate it with a lathe object.

Hope it will help.

Pascal


Mike Horvath <mik### [at] gmailcom> wrote:
> How would I create a paraboloid with thickness N?
>
> I'm guessing I need need to create an offset surface of some sort. Does
> it need to be an isosurface?
>
>
>
> Mike

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