Just recently I finished making an overworld map using RPG Maker MV. It has become kind of a hobbie to me. I haven't really made anything else in the software besides using the map editor, I'm sure I can't get a game done on my own. Since you're basically creating pixel art, I started experimenting and creating a few maps on my own. The video above is a timelapse of a 4 hour process in which I just sat down and "freestyled" a map from scratch on the editor. You'll be able to see how I went from the most basic shapes, to detailing and giving the map texture for a very organic look. It may not be pratical for a game, but I think that the ending result turned out great. I want to post it here for anyone wanting to use as reference for future projects given that the process itself is pretty straight forward.