#include "colors.inc"

camera {

  location < 12.0, 12.0, 12.0>
  look_at <0.0,0.0,0.0>
  angle 40
  }

  background { color <0,0,0.10> }

  light_source { <20,20,20> White }
  #declare w=1.5  // largura da "faixa"
  #declare a=1.0 // tamanho do "cubo-base"
  #declare b=2.5
  #declare k=10.0
  #declare Node = union {
    bicubic_patch {
                   type 1 flatness 0.01 u_steps 8 v_steps 8,
                   <-w/2,a,0> <w/2,a+b,0> <-w/2,a+b,0> <-w/2,a,0>
                   <-w/2,a,k> <w/2,a+b,k> <-w/2,a+b,k> <-w/2,a,k>
                   <a,-k,-w/2> <a+b,-k,w/2> <a+b,-k,-w/2> <a,-k,-w/2>
                   <a, 0,-w/2> <a+b, 0,w/2> <a+b, 0,-w/2> <a, 0,-w/2>
                   }
  }

  #declare SNode = union {
                          object { Node }
                          object { Node rotate 90*y rotate 90*x}
                          object { Node rotate 90*y rotate 90*x rotate 90*y rotate 90*x}
                          texture{
                                  pigment { color rgb <1.0,1.0,1.0> }
                                  }
                        }

object { SNode }
//object { SNode rotate <45,45,45> }