object{ Hyperboloid_Y rotate<90,0,0> 
        clipped_by { box {<-2.5,-2.5,-2.0>,<2.5, 2.50,2.0>} }
   
        texture { pigment{ color rgb<0.5, 0.4, 0.80> }
                  finish { phong 0.1}
                }
        scale <1,1,1>*0.5 rotate<0,0,0> translate<0,0.00,0.0>
      } // -------------------------------------------------------