Wouldn't you like to be able to apply a texture to a rock but have the top of the rock have snow or moss on it? I did.. I found it useful to do that.. so this tutorial goes over how to apply different textures based on the angle to a game object.
On the top and bottom angles (Y axis) of a game object I apply a moss texture. On the sides I apply a rock texture. But, the whole thing is one material defined. And the material is using the shader graph we learn to build here in this tutorial.
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Omarvision game programming tutorials, unity game engine. http://www.omarvision.com. Free classes at Microsoft Store - International Plaza 2223 N. West Shore Blvd, Tampa FL 33607