When we do the gallery wrap on our canvas prints, I usually take just a tad along the edge of the image and digitally stretch it to several times its original width to wrap around the edge of the frame. That sets up an optical illusion. When you move to the side of the image as it’s on the wall, there will be some angle at which the stretched edge image will seem to be just a continuation of the front image. I’ve discussed this with people in our booth at art festivals but left the calculation of that angle as an exercise for the listener. Now I’ll describe the solution to that exercise in the article “Finding the Angle of the Illusion”. This article is now on our website. It can’t yet be reached through the menu system, though. (I’ve recruited a friend to help me update the website, which is long overdue, so please bear with us). [That problem has been fixed.]
Caution: this solution does involve basic trigonometry. Who would have thought we would ever use that stuff?