newmtl mat17
  Kd 0.27 0.35 0.39

newmtl mat15
  Kd 0.81 0.85 0.86

newmtl mat21
  Kd 1.00 1.00 1.00

newmtl mat22
  Kd 0.62 0.62 0.62

newmtl mat24
  Ka 0.58 0.65 1.00
  Kd 0.92 0.95 0.94
  Ks 1 1 1
  illum 9
  Ns 300
  d 0.4
  Ni 1.5