Adobe’s Photoshop software continues to evolve with more additions being added all the time. One recent new feature is Sky Replacement. Some sample skies are included to get you started. You can, of course, add your own and use them which is a great asset if you are “creating” new images and uploading them to library websites. At least then the complete copyright rests with me as the photographer and so I do not need to worry unduly on this score.
I have played around with it using examples of aircraft images shot during a visit I paid to Turweston airfield in June 2021. Here is one of my reworked images.