mtllib 9fs.mtl
usemtl 9fs
v -50 -10 0
v 50 -10 0
v -50 10 0
v 50 10 0
vt 0 0
vt 1 0
vt 0 1
vt 1 1
f 1/1 2/2 3/3
f 4/4 3/3 2/2