Hi,

I'm wondering if it's possible to have an isosurface where a base
function has a one of two or more functions subtracted (or added)
based on the y value. I'm sure I remember seeing such a thing in the
original isosurface patch for pov 3 by R suzuki. I'm thinking of
something like the following 

isosurface{
                  function{
			f_base(x,y,z)
		      #if (y>0.5)
			-function{f_detail_1(x,y,z)*.15}
		      #else
			-function{f_detail_2(x,y,z)*.15}
		      #end
		     }

	     texture(.....}
}

But this dosn't seem to work!

Does anyone know of a way to achieve the same result ?

Thanks i advance

Rob Richards

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