I’m not google to tell you what is normal map.
For more info see :
The idea is old and gold.
I plan to use normal mapping in the “My Room” project.
Here is a cool themo what normal map is and how cool it looks. It’s in the basics of low-poly modelling and low-poly meshes are used widely in the games industry.
Here is someone elses demo:
You liked it and want to make one on your own?!?
See this :
http://zarria.net/nrmphoto/nrmphoto.html and http://www.katsbits.com/tutorials/textures/how-not-to-make-normal-maps-from-photos-or-images.php