@Keet
I didn't mean to imply he was trying to make fancy scene breaks, I just wanted to point out that using anything but a 'real' scene break is not going to work out in the end. A real scene break (< hr >) can be styled with CSS and will ensure consistency across all chapters. In other words: you don't create a specific scene break in your original text but use styling when you process the book to html or an epub.
But the problem is, I still primarily work in the TXT format. That is what I use when reading an e-book on my phone, and I actually do not use any kind of markup language in my writing.
I really am "old school", and as the first word processor I used was WordStar a lot of my habits predate the WWW. So telling someone to use something in CSS or HTML really means nothing. Personally, I just don't get the point of doing that myself. Plus, if I upload it somewhere else that may well not work at all.
Say ASSTR, even though I have not posted there in well over a decade. Then there just ends up being random GIGO code in the middle of the story, even more jarring.