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

In my humble opinion, the mine turned out not very well (this is, of course, not a complaint to Wizard Necromancer, who did a pretty good job with it from the seventh game). The reason is simple: the piles of ore look exactly like the static stones used for decoration and as obstacles. So, if you need to replace one of the mine/sulfur mine, I would replace the sulfur mine...

gold mine

These mines, by the way, are good in the version from the seventh game.