newmtl mat22
  Kd 0.62 0.62 0.62

newmtl mat18
  Kd 1.00 0.80 0.53

newmtl mat10
  Kd 0.30 0.69 0.31

newmtl mat19
  Kd 0.87 0.60 0.27

newmtl mat20
  Kd 0.47 0.33 0.28