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

Based on the screenshot of the tab:
blocked Tiles - impassable areas of the object
active Tiles - contact cell of the object (there can be several; when capturing, the hero will move to the nearest cell to capture a mine, dwelling, etc.). It should not be blocked by blocked Tiles.
hole Tiles - cells where the texture of the ground surface is removed (e.g., to create craters).
Each cell needs to be assigned X and Y positions relative to the center of the model (e.g., x=4, y=-3).