k3d/share/shaders/k3d_terran.sl:29:		   float purt_scale = .9; float map_exp = 0;
k3d/share/shaders/k3d_terran.sl:37:  float chaos, latitude, purt;
k3d/share/shaders/k3d_terran.sl:102:  /* fractally purturb color map offset using "chaos" */
k3d/share/shaders/k3d_terran.sl:103:  /*  "nonlinear" scales purturbation-by-z */
k3d/share/shaders/k3d_terran.sl:104:  /*  "purt_scale" scales overall purturbation */
k3d/share/shaders/k3d_terran.sl:105:  latitude += chaos * (nonlinear * (1 - latitude) + purt_scale);
k3d/share/shaders/k3d_terran.sl:149:	      purt += o * snoise(l * PP);
k3d/share/shaders/k3d_terran.sl:153:	  Ct += (mottle_mag * purt) * (color(0.5, 0.175, 0.5));
k3d/share/shaders/k3d_terran2.sl:29: *    lat_scale, nonlinear, purt_scale, map_exp - control scaling of 
k3d/share/shaders/k3d_terran2.sl:88:	  float purt_scale = .9;
k3d/share/shaders/k3d_terran2.sl:100:  float chaos, latitude, purt;
k3d/share/shaders/k3d_terran2.sl:157:  /* fractally purturb color map offset using "chaos" */
k3d/share/shaders/k3d_terran2.sl:158:  /*  "nonlinear" scales purturbation-by-z */
k3d/share/shaders/k3d_terran2.sl:159:  /*  "purt_scale" scales overall purturbation */
k3d/share/shaders/k3d_terran2.sl:160:  latitude += chaos*(nonlinear*(1-latitude) + purt_scale);
k3d/share/shaders/k3d_terran2.sl:206:	     purt += o * snoise (l * PP);
k3d/share/shaders/k3d_terran2.sl:210:	 Ct += (mottle_mag * purt) * (color (0.5,0.175,0.5));
