newmtl lambert4SG illum 4 Kd 0.10 0.03 0.01 Ka 0.00 0.00 0.00 Tf 1.00 1.00 1.00 Ni 1.00 newmtl lambert5SG illum 4 Kd 0.66 0.66 0.66 Ka 0.00 0.00 0.00 Tf 1.00 1.00 1.00 Ni 1.00