newmtl mat25
  Ka 1.00 0.65 0.67
  Kd 0.92 0.95 0.94
  Ks 1 1 1
  illum 9
  Ns 300
  d 0.4
  Ni 1.5

newmtl mat13
  Kd 1.00 0.60 0.00

newmtl mat21
  Kd 1.00 1.00 1.00