Hello everyone, foudn the world of ISO surfaces

they are nice.. I am getting to the point where I understand them, however there is a
modifier that I can't quite get.  it's tne Noise3d.  I'm having just a little bit a
hard time trying this one out.. does anyone know of a link that has a "good"
explination or tutorial of the Noise3d function.

I'm using a ISO Surface like:

isosurface {
  function { x }
  contained_by { box { <-1, -3, -1>, <1,3,1> } }
}

When I through the Noise Modifier in the function it does some ODD stuff.. 
So I was just looking for a good explination of the noise3d function

Thanks
Dave

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