[Paraview] connectivity of partitioned unstructured grid

[Favre Jean]

Hello

I have an hexahedral grid, in a *vtu file. When read on a local client, the Connectivity filter *correctly* detects that there is a single region (with Extract All Regions).

The same *vtu file, when read in parallel, shows multiple regions, with *some* region boundaries matching processor boundaries.

Adding D3 in between, makes things even worse, as some cells are completely dropped. Yet, the cells are only hexahedra, thus with face-to-face connectivity. Can D3 be forced to generate ghost cells which would ensure correct region extraction?

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Jean/CSCS