Okay So I am not by a machine that can check this but here’s my question.
I know you can change the texture by slope and height but can you change the set of textures by X and Y position?
So you can set the “Center” of your world, whatever it may be (mountain top, ocean, swamp, etc.), as it increases in either direction the textures would alter. Positive X could be north and more of a snow landscape would start to show. same with the other directions with their own sets.
Of course this is more of an idea for large open world maps.