Now I add more details and colors to the tileset as well as a few more special tiles for doorways, corners, and the like.
Sadly the resulting tileset compressed is using more than 256 characters which is a bit large. So I have to optimize the tiles to use as little different chars as possible while still retaining a reasonable amount of detail. This takes quite some time and different approaches until I am finally satisfied.
The final tileset uses 247 characters, staying a few characters below the 256 threshold. I might come back later to push that number even further but for now this is sufficient.