newmtl mat21
  Kd 1.00 1.00 1.00

newmtl mat4
  Kd 0.00 0.74 0.83

newmtl mat18
  Kd 1.00 0.80 0.53

newmtl mat25
  Ka 1.00 0.65 0.67
  Kd 0.92 0.95 0.94
  Ks 1 1 1
  illum 9
  Ns 300
  d 0.4
  Ni 1.5

newmtl mat19
  Kd 0.87 0.60 0.27