changing terrain in game

first im wondering if anyone has done this if so have they got it so that the land will just be one solid ttile (such as just grass) if it is change. and if no is there a way to do it with haviing many different tiles.


also can u cahnge the skin of blight?

there is a new trigger in 1.18 which you can use to change the tile. the tile must be imported on the map you're using first before you can change to it.