Yes, I know this is not naturally the group for this image, which is of my snow-covered deck overlooking what I call Ground Level Tango. It's here to illustrate the point I was making here a few days ago about it being more important to align verticals than horizontals. There a lot of vertical lines here, and I know (because I personally checked each one with a spirit level before hammering each one into place 30 years ago) that they are really and exactly vertical. The fence railing is similarly level all the way around. The table is a rectangle with rounded corners.
The image is a panoramic composite of 12 vertical images shot with a 20mm lens. I was trying to be on-center so whatever distortion there might be would be even to each side. I can only conclude the table was not quite centered or square.
What a great example of your point. It almost feels like an Escher!
Thanks, Ruth. FYI, I have been using DxO's Viewpoint 3 filter to help me make verticals vertical and occasionally horizontals horizontal. Even so, as in this example, that can be problematic.