newmtl mat5
  Kd 0.01 0.61 0.90

newmtl mat18
  Kd 1.00 0.80 0.53

newmtl mat21
  Kd 1.00 1.00 1.00

newmtl mat8
  Kd 0.96 0.26 0.21

newmtl mat12
  Kd 1.00 0.92 0.23

newmtl mat23
  Kd 0.10 0.10 0.10

newmtl mat9
  Kd 0.55 0.76 0.29