Hi everyone,
I have occasionally modified some epub files in the past, modifying chapter break and section break images that are embedded in some books to make them PNG files with an alpha channel. This is so I wasn't assaulted by a bright white box surrounding the image when I was reading them on my tablet in dark mode, only a bit of white glow around the border of the actual image. This isn't really for the large images with maps and title pages and stuff, but mainly for the images that are inline with text in the book.
Nowadays, I am using a Kindle Paperwhite, which has made reading so much more enjoyable. I recently started using KOReader on my Kindle and noticed that when using "Night