Landscape material that looks wet?

I want to be able to paint on different roughness(es?) by creating a layer but I couldn’t get it to work. Does anyone have any tips?

Just make another layer with a darker roughness map and paint with that, might want to darken the base color as well slightly.

Hmm, I don’t seem to be able to get any layers for roughness or metallic to work. Do you link it up the same as diffuse and normals? I copied my layer blend box and set all the values to 1 and then hook it into metallic. Nothing changed.

Just copy your Landscape Layer Blend node for each output you want to use, make sure they have the same layer names and then plug in what ever you feel like in each layer and then into the right output.