/*Surface de Enneper
 équation :
     ((y^2-x^2)/(2*z)+2*z^2/9+2/3)^3-
      6*((y^2-x^2)/(4*z)-(1/4)*(x^2+y^2+(8/9)*z^2)+2/9)^2=0*/

#include "colors.inc"

camera { location <0.5,3,-12>*1.1 look_at<0,0.,0> }
light_source { <50,80,-100> color White }
light_source { <-10,0,15> color rgb<0.3,0.1,0>*0.9 }
background {rgb<0.8,0.8,0.8>}

sky_sphere {
    pigment {
      gradient y
      color_map {
        [ 0.5  color rgb<0.4,0.8,1> ]
        [ 0.59  color  rgb<0.2,0.4,0.8> ]
                }
      scale 2
      translate -1
    }
  }

 fog {
  fog_type 3
  distance 150
  color SkyBlue
}

    poly{9,<0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-.125,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
         0,0,0,0,0,0,0,.375,0,0,0,0,0,0,0,-.20833,-.75,.125,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
         0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-.37500,0,0,0,0,0,0,0,-1.0833,
         0,-.25000,0,0,0,0,0,0,0,0,0,-.074074,-.66667,-1.1111,.66667,0,0,0,0,0,0,0,0,
         0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
         0,0,0,0,0,0,0,0,0,0,.12500,0,0,0,0,0,0,0,-.20833,.75000,.12500,0,0,0,0,0,0,0,0,
         0,.074074,-.66667,1.1111,.66667,0,0,0,0,0,0,0,0,0,0,0,0,.0109741,0,-.19753,
         0,.88889,0,0,0,0,0.>
    clipped_by { sphere { <0,0,0>, 6 }
             }
    bounded_by { clipped_by }
    pigment {  rgb <0.8,.55,.1>*1.1  }
    // couleur gris rgb <1,1,1>*0.85
    // couleur bronze rgb <0.8,.55,.1>*1.1
    finish { specular .5 roughness 0.12 ambient 0.3 }
   rotate <-10,65,0> //<20,60,0>
        }

  plane{ y,-20
     texture{
       pigment{rgb<0,0.4,0.>}
       normal{ bumps 2.5 noise_generator 3}
       scale <4,0.5,1>
       finish {ambient 0.8 diffuse 0.7 roughness 0.008 }
           }
      }