One landscape with two different material

two different material in one landscape,example like->
here is desert then walk after 3 meter was a lava place(landscape) or snow winter(landscape)
Possible to do that?
How to do.it?

Hi!
Look into this tutorial

It talks about how to create grass, but also includes how to blend more material into a landscape material.
Once you’ve done that you can paint whatever material you like.