Hello, perhaps this question is better suited to a vtk forum, but I thought I’d start here: I generate vector field data with an ab initio code, and I have been able to convert it to a vtkStrucuturedGrid and visualize it in Paraview. However, I would like at the same time to add to the view a molecule, located on the grid–it would be sufficient to show the molecule as spheres, but including bonds also would be nice. I am unclear if I should be trying to generate a vtkMultiBlock object, with one block for the vector field and another for the spheres, or something else. Any suggestions or examples would be most welcome. Thanks!