# plane.obj with materials and documentation
#
mtllib cube-textures.mtl
g plane
usemtl buffy-gray
v  0.0  0.0  0.0   v1 = back lower left (origin)
v  0.0  1.0  0.0   v2 = back upper left
v  1.0  0.0  0.0   v3 = back lower right
v  1.0  1.0  0.0   v4 = back upper right

vn  0.0  0.0  1.0
 
vt 0.0 0.0  # vt=1 is upper left of texture
vt 0.0 1.0  # vt=2 is lower left of texture
vt 1.0 0.0  # vt=3 is upper right of texture
vt 1.0 1.0  # vt=4 is lower right of texture

f  1/2/1  3/4/1  4/3/1
f  1/2/1  4/3/1  2/1/1