Would some kindly soul walk me through the basics of getting the Toon shader onto Terrain? Some have said to simply overwrite the terrain shader with the toon shader, but I don’t even know where to begin with that.
I’ve downloaded the package for Unity built-in shaders, but am reluctant to experimentally overwrite things willy-nilly.
You cannot overwrite the built-in shaders. When you import one of the shaders from that package it will be a normal custom shader like any other. However, as far as I know, the toon shader is not in the built-in shader package but in the standard assets.
Here is one example on how to overwrite the terrain shader. There are many more if you search for them.
So, do your toon shader based on how this one is done.