intersection { 
 box {<-2,0,-2.5>,<2.5, 4.00,2.5>}
 object{ Paraboloid_Y}  
         texture{ pigment{ color rgb<1, 0.5, 0.7> }
                  finish { phong 1}
                }
         scale <1,1,1>*0.5 rotate<0,0,0> translate<0,0.00,0.0>
       } // end of object ----------------------------------