intersection{
 box {<-2.0, -4.0,-4.0>,<2.0, 4.0,4.0>}
 object{ Hyperboloid }
   
 texture { pigment{ color rgb<0.7, 1.0, 0.0> }
           finish { phong 0.1}
         }
 scale <1,0.5,1>*0.5 rotate<0,0,0> translate<0,1.00,0.0>
 } // end of intersection  -----------------------------