Insta360 Pro panorama. (A) Viewed in Microsoft Photos as a flat, 2D image. (B) Viewed in PTGui as 3D virtual reality in which one can zoom in/out, look up/down, and turn left/right. Yellow rectangle in (A) represents the field of view shown in (B). Red circles show the location of a plastic yellow number tent. Red rectangles show locations of north-pointing markers.