I have a landscape material with some different simple layers (grass, stone m.m.) for my low poly game but want to add a water material to my landscape material, so I can paint rivers on my landscape. All the materials are from a package I bought on Epics Marketplace. Is it possible to add the water material into the layer blend? Please see the pictures.
Perhaps as a material function, or a material parameter collection. In a material function, use a Make Material Attributes node to connect to the base properties as it would be in a regular material. It might require using a Break Material Attributes node too. Do the reading on those nodes to see how it works, or watch a tutorial or two for help building it correctly. Then the output of the material function would probably plug in the Layer Water of the Layer Blend.