// Renderparameters ...
// +A0.6 +J1.0 +AM1 +R3 +KI0.0 +KF1.0 +KFI0 +KFF250
// +A0.1 +J1.0 +AM1 +R4 +K0.75
camera {
   location <0,1,-5>
   look_at <0,-2,0>
   }
light_source {
   <20,10,-1>
   color rgb <1,0.5,0>
   fade_distance 7
   }
light_source {
   <-20,10,-1>
   color rgb <0,0.5,1>
   fade_distance 7
   }
box {
   <-30,-1,-10><0,0,30>
   pigment {
       color rgb 1
       }
   finish {
       ambient 0
       diffuse 1

       }
   normal {
       crackle 10*clock
       scale 0.5
       }
   no_shadow
   }

#declare CracklePattern=
   function {
       pattern {
           crackle
       }
   }
isosurface {
   function {
       y-(CracklePattern(x*2,0,z*2)*0.5*clock)
       }
   contained_by {
       box {
           <30,-1,-10><0,0.5,30>
           }
       }
   pigment {
       color rgb 1
       }
   finish {
       ambient 0
       diffuse 1

       }
   no_shadow
   }
box {
   <-30,-3,-3><30,20,1>
   pigment {
       checker  color rgb 1, color rgb 0.5
       translate x*-0.5
       scale <20,0.05,1>
       }
   finish {ambient 1}
   no_shadow
   }

--
Jan Walzer <jan### [at] lzernet>

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