k3d/share/shaders/k3d_grids.sl:14:float G1L1_fuzz=0.453; 
k3d/share/shaders/k3d_grids.sl:65:color G1L1_layer_opac = pulse(G1L1_linewidth, 1-G1L1_linewidth, G1L1_fuzz, G1L1_tt);
