You could combi-print the background and sky, then print the figure separately and trim it out of the paper, collage it together (thin the edges a lot + use thin paper anyway) and re-photograph. You will have to experiment with contrast as it will bump up a little. Admittedly I last did this more than twenty years ago (and I used a huge copy-camera at work), but it can succeed, guaranteed. The different lighting for the figure and the background will be a thing to watch too.