Route Art My Landscape Is So Shiny

What have I done wrong in my LandscapeMaterial?

 

The _N files need to go into normal, never mind

 

Are the _M files intended to go into Metallic?

 

Yes that should be correct

 

I don't exactly know how you set up your landscape material in full (as the screenshot only shows a portion) but what you did in the second image seems illogical too me at first sight.

You have several LayerBlend objects, each composed of the same materials and connect each of these LayerBlend objects to the BaseColor, Metallic and Roughness inlets of the Landscape Material object.

Don't know what you want to do here, but I can't quite understand the logic behind that. Otherwise, could you explain what you do there?

 

It's already solved, the problem was, I kind of mixed up the Normal and Roughness input, for some reason