          texture{ pigment{ gradient <1,1,0>
                            color_map{
                                [ 0.0 color rgb<1,1,1> ]
                                [ 0.5 color rgb<1,1,1> ]
                                [ 0.5 color rgb<1,0,0> ]
                                [ 1.0 color rgb<1,0,0> ]
                               } // end color_map

                           } // end pigment
                 //normal  { bumps 0.5 scale  0.005 }
                   finish  { phong 1 reflection 0.00 }
                 } // end of texture -------------------
