//以下為知難行易的第四個材質的部分程式(波狀的地面)

//      ground plane



surf {

        spec .5 .5 .5

        fuzz 0.01

        no_antialias

        bump {

              wave {

                    center 0 0 0

                    wavelength 3.0

                    amplitude .16

                    damping .9

                    phase 0

                    }

              }



}



ring { center 0 0 0 normal 0 0 1 radius 10000 }



//     Four chinese words KNOW



surf {

           bump {

                   turb {

                           scale .5 .5 .5

                           amp .8

                           terms 1.6

                         }

                 }

             diff gold spec .7 .7 .7 shine 40

       }

//========================================================