ref: e862d6f0224de67b0a329e16b91841206feb844a 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