First of all, please forgive me clumsy English!
1. I have a normal map, produced a smart material. But I found that after using normal maps disappeared! "As shown"
2. The same normal map, I use the menu (Textures / Import / Normal Map) was shown to be correct.
1. https://drive.google.com/file/d/0B7NMMulstWw_d0x2NkoyUFIycjA/view
2. https://drive.google.com/file/d/0B7NMMulstWw_bzBjMEx4MkRrODQ/view
Excuse me, where I set up wrong!
If you can tell, very grateful. . . . . .
Thank you all