"My quarantine project has morphed into a series of over seventy assemblies I call 'Reflections' (https://www.flickr.com/photos/dgeugene/albums/72157714291461668). The process is simple: place the starting image on a canvas in Photoshop, duplicate and flip the image horizontally and join it to the first, take that pair, flip vertically and join underneath the first pair. A good result depends on the qualities of the starting image which are all from my files.
I start with a 30x40 canvas at 225dpi and then reduce it to 24x32 (111Mb) for the final product. Since the original 6Mb is not much enlarged the result has very high resolution as you can see if you follow the link.