We used the Panorama setting on my phone to create a 9000x2000 image. I tried uploading it as a 360 degree image in Storyline360 and it worked, although looked puckered. I edited the image in paint.net to add to the canvas height, darkened the top strip which would be the ceiling, and copied a thin horizontal strip of the floor that I just stretched out. It looked passable at 9000x2500 pixel resolution.
If you look up in the 360 degree room, the ceiling is just black, which worked for this indoor space. If you tilt down, the floor looks strange and stretched out, but I felt like it does not take away from being able to tour the exhibit hall for this demo. :)
Next I'm going to test using the Google Street View app to create a 360 degree view with my cell phone.