Man, this took a lot longer than it should have! We won’t delve into why the release of this page took so long (you can click here if you want a crash course), we will simply concentrate on the now.
I started writing the script back in early-mid December 2016, back when I had a completely different artist working with me on the project, and when we didn’t know a lot about the Underworld (then again, even after the book, we still don’t know what exactly is there outside of what the basic, seemingly partial geography is in comparison to Mewni). Right out of the gate, you’ll notice that its denizens live in a city that look a lot more modern in comparison to the kingdom above ground; I figured that since Tom has modern stuff (such as arcade cabinets) in his room, why not the entire land… or should I say “cavern”?
I, and the artists, have come up with a whole history about the Underworld, from why they have a modern-looking infrastructure, to why you have humans like Brian/Mr.Candle being in contact with the Lucitors, if not living there in some form or fashion. Obviously, we won’t go into detail, but we’re mentioning this to show that we’ve left no stone unturned when it comes to worldbuilding/minor details.
Star Vs The Forces Of Evil © Daron Nefcy & Disney