newmtl mat21
  Kd 1.00 1.00 1.00

newmtl mat22
  Kd 0.62 0.62 0.62

newmtl mat10
  Kd 0.30 0.69 0.31

newmtl mat20
  Kd 0.47 0.33 0.28

newmtl mat9
  Kd 0.55 0.76 0.29