Photoshop CS6 Extended – Image Based Lights in 3D Design
Powerful Global Lighting Solutions for 3D Designs
Using Image Based Lighting to add realism to 3D Scenes in Photoshop
In Photoshop CS6 the image based light (IBL) is found in the environment section of the 3D panel.
In some designs the IBL can greatly enhance the result with very little effort.
The Photoshop CS6 Extended website has plenty of materials including IBLs for use in your projects.