MTL File Example
newmtl mat1
Ka 0.5000 0.5000 0.5000
Kd 0.7000 0.7000 0.7000
Ks 1.0000 1.0000 1.0000
Ns 43.6364
Ni 1.1273
illum 2
OBJ File Example
# (c) Copyright 1992 Softimage Inc.
# Sun Oct 6 17:28:32 1996
o cube1
mtllib wavedemo.mtl
v -5.000000 0.014284 -5.000000
v -5.000000 0.014284 5.000000
v -5.000000 10.014284 5.000000
v -5.000000 10.014284 -5.000000
v 5.000000 0.014284 5.000000
v 5.000000 10.014284 5.000000
v 5.000000 0.014284 -5.000000
v 5.000000 10.014284 -5.000000
# 8 vertice
vn -1.000000 0.000000 0.000000
vn 0.000000 0.000000 1.000000
vn 1.000000 0.000000 0.000000
vn 0.000000 0.000000 -1.000000
vn 0.000000 -1.000000 0.000000
vn 0.000000 1.000000 0.000000
# 6 normales
# 0 texture vertices
usemtl mat1