newmtl mat23
  Kd 0.10 0.10 0.10

newmtl mat21
  Kd 1.00 1.00 1.00

newmtl mat15
  Kd 0.81 0.85 0.86

newmtl mat22
  Kd 0.62 0.62 0.62

newmtl mat12
  Kd 1.00 0.92 0.23

newmtl mat8
  Kd 0.96 0.26 0.21