isosurface {   // ----------------------------------------------------
  
  function{ 
  sqrt(  0.5*x*x + y*y + z*z) - 0.85 
  - f_noise3d( x*12, y*12, z*12 )
  }
   
  contained_by { box { -2.5, 2.5 } }
  accuracy 0.002
  max_gradient 4

    texture{ pigment{ color rgb<0.45,0.9,0.0.1>}
             finish { phong 1 reflection 0.1}}
  scale 0.75
  rotate<0,0,0> 
  translate <0,1.4,0> 
}
 // end of isosurface -------------------------------------------------