        texture{ pigment{ color rgb<0.25,0.55,0.15> }
                 normal { radial poly_wave frequency 32 scale 1.57  turbulence 0.2 rotate< 0,0,0>}
                 finish { diffuse 0.9 phong 1  reflection 0.0}
                 rotate<90,0,0>
               } // end of texture ---------------------------
