k3d/share/shaders/k3d_cyclone.sl:42:	  /* invert and make nonlinear */
k3d/share/shaders/k3d_gloop.sl:5: * an example of nonlinear displacements 
k3d/share/shaders/k3d_terran.sl:28:		   float nonlinear = 0;
k3d/share/shaders/k3d_terran.sl:103:  /*  "nonlinear" scales purturbation-by-z */
k3d/share/shaders/k3d_terran.sl:105:  latitude += chaos * (nonlinear * (1 - latitude) + purt_scale);
k3d/share/shaders/k3d_terran2.sl:29: *    lat_scale, nonlinear, purt_scale, map_exp - control scaling of 
k3d/share/shaders/k3d_terran2.sl:87:	  float nonlinear = 0;
k3d/share/shaders/k3d_terran2.sl:158:  /*  "nonlinear" scales purturbation-by-z */
k3d/share/shaders/k3d_terran2.sl:160:  latitude += chaos*(nonlinear*(1-latitude) + purt_scale);
