RTF is a global modification that replaces all towns in the game.

Found a bug: The "Mark of Darkness" spell should work like a wizard's mark, but it somehow gets applied to your own creatures. When you use magic (any spell) with a unit, nothing happens.

I'm encountering this for the first time; I'll need to check it out! I only touched the icons and descriptions of the skills, so I wonder what caused this!

Added 1 minute ago

For now, it's like this. Soon there will be ground, walls, etc.

Cool! Just need to remove the "hole tile" from the map object, and the hole will disappear.