newmtl mat5
  Kd 0.01 0.61 0.90

newmtl mat13
  Kd 1.00 0.60 0.00

newmtl mat18
  Kd 1.00 0.80 0.53

newmtl mat23
  Kd 0.10 0.10 0.10

newmtl mat12
  Kd 1.00 0.92 0.23

newmtl mat4
  Kd 0.00 0.74 0.83