k3d/share/shaders/k3d_graphic_lines.sl:257:	vector V_ink;
k3d/share/shaders/k3d_graphic_lines.sl:261:	V_ink=-normalize(I);
k3d/share/shaders/k3d_graphic_lines.sl:275:	}illumcolor_ink=(Ka_ink*ambient()+Kd_ink*diffuse(Nf_ink)+Ks_ink*specular(Nf_ink,V_ink,roughness_ink));
