Yes, you can now write out OpenVDB files from VTK using the VTK master. In my opinion it works best for vtkImageData but should work for most other vtkDataSets as well. If you try the vtkOpenVDBWriter out and have issues or recommended improvements, please let me know so that I can improve upon it. It does require third party libraries such as OpenVDB and all of its dependencies (Boost, OpenEXR, etc.).
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