ref: ca7f3196863e0012ec244f7e0354005275e69726 dir: /mdl/9fs.obj/
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