Rokk Mann Texture example

During my expedition to the location earlier this year I photographed some examples of the rocks on Mt Maroon summit. Using Crazy Bump, it can produce some really nice looking textures.

The night before the actual shoot I plan to acquire more textures using a more accurate method for normal maps. It's called Normal Map Photography. The name and method was created by Ryan Clark on his website - http://zarria.net/nrmphoto/nrmphoto.html
Basically, the method is to photograph the subject 4 times from one angle in complete darkness. In each of the 4 photos a light source is positioned at the top, bottom, left and right, respectively.
In Photoshop these images are changed to represent a normal map. It can also be used with crazy bump as the author is the same person.