mtllib cube.mtl
g cube
 
v 0.0 0.0 0.0
v 0.0 0.0 1.0
v 0.0 1.0 0.0
v 0.0 1.0 1.0
v 1.0 0.0 0.0
v 1.0 0.0 1.0
v 1.0 1.0 0.0
v 1.0 1.0 1.0

vn 0.0 0.0 1.0
vn 0.0 0.0 -1.0
vn 0.0 1.0 0.0
vn 0.0 -1.0 0.0
vn 1.0 0.0 0.0
vn -1.0 0.0 0.0
usemtl flatwhite 
f 1//2 7//2 5//2
f 1//2 3//2 7//2 
f 1//6 4//6 3//6 
f 1//6 2//6 4//6 
f 3//3 8//3 7//3 
f 3//3 4//3 8//3 
f 5//5 7//5 8//5 
f 5//5 8//5 6//5 
f 1//4 5//4 6//4 
f 1//4 6//4 2//4 
f 2//1 6//1 8//1 
f 2//1 8//1 4//1