k3d/share/shaders/k3d_graphic_lines.sl:168:	color Ci_paint = Ci;
k3d/share/shaders/k3d_graphic_lines.sl:233:	Ci_paint=surface_opac_paint*color_curve_paint;
k3d/share/shaders/k3d_graphic_lines.sl:355:	layer_color = Cs*(Kd*diff*Ci_paint + Ka*ambient()) + Ci_highlight*Ks*spec;
