Now you could use any panorama to do it. Now the problem with my picture is that of course, it doesn’t wrap around but I have begun to create a duplicate of the tree on this end of the image so it will partially wrap around. I’ll need to do a bit of cloning to fix it when I’ve done my amazing circle, but this is a strip. If you’ve got a 360-degree panorama, it will be even better. Add a little bit of image to the top and bottom of your picture. What you want is an image that’s roughly four times as wide as it is high so I’ve added a bit of white on either side. And this will be either the outside or the inside of the fantastic circle when we create it.
The first step is to resize the image. So I’m going to choose Image and then Image Size. I’m going to deselect Constrain Proportions because although this image is 8,000 x 2,000 I want it to be square but without losing any of the content. So I’m going to deselect Constrain Proportions and type 8,000 in here because that’s the largest of these two values, so now I’m going to get a square image quite a bit larger than it was, and click Ok.