cube.stl

    solid cube_corner
        facet normal 0.0 -1.0 0.0
            outer loop
                vertex 0.0 0.0 0.0
                vertex 1.0 0.0 0.0
                vertex 0.0 0.0 1.0
            endloop
        endfacet
        facet normal 0.0 0.0 -1.0
            outer loop
                vertex 0.0 0.0 0.0
                vertex 0.0 1.0 0.0
                vertex 1.0 0.0 0.0
            endloop
        endfacet
        facet normal -1.0 0.0 0.0
            outer loop
                vertex 0.0 0.0 0.0
                vertex 0.0 0.0 1.0
                vertex 0.0 1.0 0.0
            endloop
        endfacet
        facet normal 0.577 0.577 0.577
            outer loop
                vertex 1.0 0.0 0.0
                vertex 0.0 1.0 0.0
                vertex 0.0 0.0 1.0
            endloop
        endfacet
    endsolid