If you are interested in editing jpegs on film sims you might take a look at old gimp tutorials. Gimp was 8 bit for years and set up more for jpegs imo, you can really do a lot
Here's one on Smart Sharpening, really fairly complicated, although this may mostly be automated on recent editing software, but interesting to do it manually. Other tutorials on gimp site and elsewhere online, if you know of others feel free to post
