k3d/share/shaders/k3d_graphic_lines.sl:185:	vector V_paint;
k3d/share/shaders/k3d_graphic_lines.sl:189:	V_paint=-normalize(I);
k3d/share/shaders/k3d_graphic_lines.sl:203:	}illumcolor_paint=(Ka_paint*ambient()+Kd_paint*diffuse(Nf_paint)+Ks_paint*specular(Nf_paint,V_paint,roughness_paint));
