newmtl mat19
  Kd 0.87 0.60 0.27

newmtl mat20
  Kd 0.47 0.33 0.28

newmtl mat23
  Kd 0.10 0.10 0.10

newmtl mat21
  Kd 1.00 1.00 1.00

newmtl mat18
  Kd 1.00 0.80 0.53