In VTK9 master, it seems that vtkQuadricLODActor does not render properly a translucent sphere. Workarounds:
- Using a standard vtkActor
- Plugging a vtkDepthSortPolyData filter
Note that on VTK-8.2.1, the render is ok but if I backport this commit: !5745 (9c70c2b9) then the issue appears.
And a minimal script: mini.py