newmtl mat8
  Kd 0.96 0.26 0.21

newmtl mat15
  Kd 0.81 0.85 0.86

newmtl mat21
  Kd 1.00 1.00 1.00

newmtl mat23
  Kd 0.10 0.10 0.10

newmtl mat22
  Kd 0.62 0.62 0.62