// Persistence Of Vision raytracer version 3.0 sample file.
 // 
 // View it by 
 // povray +D +i mobiusz1.txt
 // xv mobiusz1.tga
 //
 // Caution: You need at least 80M swap+memory to do this.
 //

#version 3.0
global_settings { assumed_gamma 2.2 }

 camera {
    location  <0, 0,-30>
    direction <0, 0,  1>
    up        <0,  1,  0>
    right     <4/3, 0,  0>
    look_at   <0, 0, 0>
    scale 0.4
    }

 background { color rgb <0.5, 0.5, 0.5> }


 light_source {<20, 30, -100> colour 1}

 #declare a=5
 #declare b=0.2
 #declare R=0.1

 #declare j=-b

union{
 #while (j<b)
  #declare i=0
  #while (i<360)
    #declare R=a*(1+j*cos(i/2))
    #declare X=R*sin(i)
    #declare Y=R*cos(i)
    #declare Z=j*sin(i/2)
    #declare i=i+0.33
    sphere { <X,Y,Z>, 0.2
      texture{
        pigment { color rgb <1,1,0> }
        finish {
         ambient 0.2
         diffuse 0.6
         phong 0.3
         phong_size 100
        }
      }
    }
  #end
  #declare j=j+0.005
 #end
  rotate <70,0,0>
}