[Paraview-developers] Parallel Paraview Rendering: Disappearance of volume data

[Prashant V]

Hello,

I am facing problem when running paraview in parallel mode.

My Paraview plugin reads a vtkMutliBlockDataset from a .vtm file and renders it in Paraview.
This vtkMutliBlockDataset comprises a volume (vtkUnstructuredGrid) and surfaces (vtkPolyData).
When Paraview is started serially, rendering works fine. However I am facing issues when Paraview is launched in parallel mode.
As it happens, in parallel run, all ranks read same vtkMutliBlockDataset and render in Paraview.
Further I apply D3 filter in pipeline. After applying D3 filter, volume data disappears leaving only surfaces (with no error message).
I tried applying D3 internally in the plugin (through code), but got same results.

Can anyone advice me here, what could be the reason of disappearance of volume data in this scenario?

Thanks,
Prashant
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