ref: ff88c093d0092176e173e1bf6cbcd96df07f7e0c dir: /mdl/basispt.obj/
mtllib basis.mtl v 0 0 0 v 1 0 0 v 0 1 0 v 0 0 1 p 1 usemtl x p 2 usemtl y p 3 usemtl z p 4