Need help stitching grey sky
I have a 360 pano which was taken on a day with grey sky, and my eye (as well as Hugin) cannot find any place from which to make control points. I tried selecting random places as control points, hoping to fool the program, but Hugin is smarter than that and it did not work.
Does anyone have any suggestions on how to add the "up" shot which is grey sky?
OR, with a 5D MkIII and a 16-35 lens set on 16mm, is 30 degrees pointed up (with a NN5L) enough to not need the "up" shot? If so, will the pano be less than 180 degrees top to bottom?