When I add a texture, if I fill the normal map slot, I get this message. “Note: in order for normal map to have effect, a custom material with normal mapped terrain shader needs to be used”. I’ve seen some custom assets (ats) that provide bump maps on the terrain with scripts. But is that what this message is referring too? How would I assign a material to the texture with the standard Unity tools? Thanks.
You need to create a new material with the Nature/Terrain/Bumped Specular shader on it. Select the terrain and click the options (gear icon I think) and drag the material to the material slot.