One material as a layer in another material

Hello everyone,
I want to paint my landscape with some nice layers. I’ve created a material for landascape with five layers which I can paint the landscape with. In starter content of a project I found a [url=][color=#333333]]([/COLOR] nice material M_AssetPlatform_grass which I want to use to paint alongside with my material. My question is: How can use this material as a painting layer in my landscape material ? Is it possible ??

@Jhonmikcy So you made the landscape material? You can just add this new material as an extra layer to the landscape in the same way you made the other five layers, no?