We had to gallery wrap a canvas to be hung on a curved wall in the customer's house. We went out and made a template of the curved wall. I did something like this years ago, but it's been a while. This house is a thirty minute drive each way North of our shop in Phoenix. The curved bars were made and the canvas stretched. It was about 48" x 60". There was no way to eliminate ripples or puckers at the top and bottom of the wrapped parts in the curved area, but when it was hung on the wall, you don't see them unless you want to get up on a ladder to look over the top or get down on your knees to look underneath. It wasn't 100% done in this photo, but after a few tweaks it was ready. I helped with the installation and the curved wall is painted orange and is right at the end of the entrance hallway where it flows into the living room area in the house. It fit the curved wall perfectly. I would post a picture of the installation but I don't usually do that from a private home without permission.