How can i add normal map on terrain in unity 5 ? when i use on material bumped specular shader it giving me warning that i should use from Terrain shaders, and it looks bad on terrain.
You add textures to terrains, the terrain texture paint tool takes in a texture and a normal map for that texture. You can add normal maps there. After you do that in the terrain properties you can add a new material for the terrain. Create a material and choose nature->terrains and select the shader you want use. Drag and drop in terrain properties.
The Shader has to be the Terrain bumped specular shader.