This was when I wasn't that great at 3D modeling... but I was really, really dedicated to replicating UNDERTALE's room layouts to a T. However, I wouldn't go by tile, I would just guestimate. That backfired. Massively. On the modern iteration of this game, I gave myself a unit of measurement: for every tile, it equals 3 by 3 studs. It's a pretty good unit!

The thumbnails are organized from the very first I have on file to the latest. You can probably see some of the improvements in the models as you go on! They're nothing special, but it's fun memories to look back on.