Hi @berk.geveci, replacing the main actor’s mapper with vtkPolyDataMapper—and leaving the selection actor’s mapper as vtkDataSetMapper— resolved the issue, thanks for the help!
One last thing — while the selector now correctly selects and highlights the faces that fall within the rectangle, I’d like to highlight all faces of a given segment along the tube, as long as at least one face from that segment was picked. The behavior I’m looking for is exhibited in the screenshots below, in which a pick such as:
would result in highlighting the entire segment:
rather than just the picked face, as is currently the case:
It seems this gets complicated as the tube filter creates a cell for each face. Thus, it’s not clear how picking one cell might be translated into highlighting all three for that line segment. Would you be able to provide any suggestions for how to move forward?
Thanks, Robert