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

Does it have a smooth and even bottom?!

What do you mean by "bottom"? Like, what's not visible at the bottom of the throne? Well, there are also stones there, but if we're talking about a high-poly model, I have three more circular sections there, like a floor, so in principle, what's at the bottom of the throne doesn't matter – it will be hidden anyway....