[General] Problem with terrain type trigger

[stan0033]

• Environment - Change terrain type at (Center of Region 8 <gen>) to Cityscape - Square Tiles using variation -1 in an area of size 1 and shape Square

This trigger makes the terrain on the whole map to change, while i only want to change a specific region. How do I do it?

 

[Wietlol]

That is impossible.... except if your map has a size of 1x1...

Maybe show something more... like everything in the trigger that does this.