// triangular non-CSG shape! 
// triangle{ <corner_1>, <corner_2>, <corner_3> }
triangle{  <0.0, 1.0, -1.0>, <0.0, 1.0, 2.0>, < 1.0, 0.0, 1.0>        
         texture { pigment{ color rgb< 0.5, 1.0, 0.0> } //  color YellowGreen
                // normal { bumps 0.5 scale 0.05 }
                   finish { phong 1 }
                 } // end of texture 
       scale <1,1,1> rotate< 0,0,0> translate<0,0,0>         
     } // end of cone -------------------------------------