newmtl mat23
  Kd 0.10 0.10 0.10

newmtl mat22
  Kd 0.62 0.62 0.62

newmtl mat15
  Kd 0.81 0.85 0.86

newmtl mat11
  Kd 0.00 0.59 0.53

newmtl mat21
  Kd 1.00 1.00 1.00