Ok, got it. Did not realize that the 3D scene didn't take the module diode information from the .PAN file into account when modeling between portrait and landscape orientation. That is very useful information.
Last question from me here. For "unlimited sheds" orientation, when in horizontal, should the "cell size" (transverse) also be doubled from the default, to account for two cells stacked in the cell group? I.e. in portrait, cell size (transverse) is 15.6 cm, and in landscape it would be 31.2 cm?
Thanks a million here.