Tips for Landscape creation/duplication

I have to create a lot of small levels using the same landscape material. Like 30+. And all of these levels have the same size, and the same height (flat). Basically a duplicate of each other, except for the painting.

So for each and every one of those, I have to create new landscape layers info and assign them to the landscape material , one by one.
Is there any way to make that process more efficient ?