My thoughts are to shift vertically, making 3 rows for every horizontal pan (however many pans it would take to capture the scene.
Hi Jim,
While that is doable with proper stitching software, like PTGUI, it would (for the best results at closer distances) require a mechanism to keep the entrance pupil stationary, in the vertical direction. That is, in my view, too error-prone and it will slow down shooting (which might cause issues with moving clouds).
I do have a 24mm TS-E Mark II and it's great for closer to the subject shifted panos.
I also have that one, and it is even very useful for close-ups, I mean really close. Due to its DoF and the large angle of view, it allows to emphasize near subject matter, and at the same time keep the connection with its surrounding environment.
Cheers,
Bart