I often struggle with selecting continuous internal surfaces in structures like pumps, pipes and tubes in CAE tools.
A typical reason why I would want to select all the internal surfaces would be to add internal pressure in a pressure vessel or in a pump. I often use the "more neighbors" command within Simulation Mechanical for this purpose, but as you may already know, this command only works for visible "lines" and not "surfaces".
It would be useful if "more neighbors" function worked with visible "surfaces" as well.