# vtkHDF: Add support for polyhedron cells
**URL:** https://discourse.vtk.org/t/vtkhdf-add-support-for-polyhedron-cells/13089
**Category:** Development
**Tags:** file-formats
**Created:** [January 17, 2024, 4:32pm UTC](https://discourse.vtk.org/t/vtkhdf-add-support-for-polyhedron-cells/13089 "2024-01-17T16:32:10Z")
**Posts on this page:** 3
**Page:** 3
### Author:  [@ahernsean](https://discourse.vtk.org/u/ahernsean)
#### Post date: [January 13, 2026, 3:54pm UTC](https://discourse.vtk.org/t/vtkhdf-add-support-for-polyhedron-cells/13089/41 "2026-01-13T15:54:24Z")
When you do convene the larger discussion about polyhedron organization, please include me if external participants are welcome. Arbitrary polyhedra are critical to Ansys/Synopsys fluids simulations.
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [January 21, 2026, 4:16pm UTC](https://discourse.vtk.org/t/vtkhdf-add-support-for-polyhedron-cells/13089/42 "2026-01-21T16:16:54Z")
posted here: [Polyhedron face connectivity improvements - #2 by mwestphal](https://discourse.vtk.org/t/polyhedron-face-connectivity-improvements/16250/2)
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### Author:  [@cory.quammen](https://discourse.vtk.org/u/cory.quammen)
#### Post date: [February 24, 2026, 8:57pm UTC](https://discourse.vtk.org/t/vtkhdf-add-support-for-polyhedron-cells/13089/43 "2026-02-24T20:57:11Z")
Support for writing polyhedral cells with vtkHDFWriter has just been merged to VTK:
[https://gitlab.kitware.com/vtk/vtk/-/merge\_requests/12947](https://gitlab.kitware.com/vtk/vtk/-/merge_requests/12947)
[Previous page](https://discourse.vtk.org/t/vtkhdf-add-support-for-polyhedron-cells/13089.md?page=2)