UV mapping for exporting blender textures to unity I am using UV mapping for exporting textures to unity. Firstly i map the object with smart uv mapping and then bake it. After that I save the image as png;  add it into material as texture of object in unity. 

With that process should I save and export blender file again after mapping objects or can i just use texture files directly? How unity understand UV maps if I just add textures as png files? I am assuming composite nodes are not exported with that method. Are there any method for exporting composite nodes? 

And are there any easier method?
You have to export your model again once you UV mapped it, because unity will not be able to get the UV data as your model don't have them.