newmtl mat12
  Kd 1.00 0.92 0.23

newmtl mat9
  Kd 0.55 0.76 0.29

newmtl mat18
  Kd 1.00 0.80 0.53

newmtl mat17
  Kd 0.27 0.35 0.39

newmtl mat7
  Kd 0.94 0.38 0.57