newmtl mat21
  Kd 1.00 1.00 1.00

newmtl mat18
  Kd 1.00 0.80 0.53

newmtl mat22
  Kd 0.62 0.62 0.62

newmtl mat19
  Kd 0.87 0.60 0.27

newmtl mat23
  Kd 0.10 0.10 0.10