#include "rmannotes.sl"
surface
dust_noise()
{

  float noise;
  color layer_color, surface_color;
  color layer_opac;

/*layer 0*/
  surface_color = (0.6,0.3,0.1);

/*layer 1*/
  layer_color= (0.2,0.07,0.12);
  noise = noise(s*90,t);
  layer_opac = noise;
  surface_color = blend(surface_color, layer_color, layer_opac);

/*layer 2*/
  layer_color =color(0.95, 0.74, 0.55);
  noise = noise(s*160,t*160)-0.6;
  layer_opac = noise;
  surface_color = blend(surface_color, layer_color, layer_opac);

Ci=surface_color;
}