Hi, I used ICE to stitch together a group of photos I took of the side of a pier from a quay that was parallel to it. I used a tripod, with the camera set in portrait orientation and rotated the camera taking several overlapping images. The results in ICE were excellent; I used the Rotating Motion setting because I guessed this was the most appropriate. However I experimented with the other camera motion settings and could not see much difference. Under what circumstances would I use Planar 1, 2