k3d/share/shaders/k3d_grids.sl:30:float G2L1_fuzz=0.0655; 
k3d/share/shaders/k3d_grids.sl:84:color G2L1_layer_opac = pulse(G2L1_linewidth, 1-G2L1_linewidth, G2L1_fuzz, G2L1_tt);
