how to creat a landscape auto materials

I have seen landscape auto materials on marketplace and it is very useful in paint the landscape, however I couldn’t find any document about how to create one. Dose anyone knows the process of how to make a landscape auto materials? Thanks very much!

Check out this documentation from Epic: Stylized Rendering Landscape | Unreal Engine Documentation

It goes through the basics techniques that most use as the base for their automatic landscape shaders. You can also download this project under the “Learn” tab in the Launcher so you can take a look at how they did it.