TruncatedPolyhedron
TruncatedPolyhedron[poly] gives the truncated polyhedron of poly by truncating all vertices.
TruncatedPolyhedron[poly, l]truncates the polyhedron poly by a length ratio l at its vertices.
Examples
TruncatedPolyhedron[PolyhedronData["Cube"]]TruncatedPolyhedron[PolyhedronData["Tetrahedron"], 0.3]Graphics3D[TruncatedPolyhedron[PolyhedronData["Octahedron"]]]*See the official Wolfram Language Reference for more details.