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

It seems to me that this approach compromises the authenticity, but I noticed the small hint icons in the corner. There are various hearts, plus signs, and so on.
Perhaps we should explore this direction further, so that the icons depict buildings, but also graphically represent what they do. For example, a beer mug, crystals, an IV symbol in a mug for the fourth-tier creatures, etc.