Human Head Demo Available
To evaluate the complex skin shader and HDR lighting, "Human Head" computes 17 offscreen textures every frame totaling over 40 Million pixels, each shaded with lengthy pixel shaders. That's more than 1.2 billion pixels every second! 4096 x 4096 color and normal textures provide photo-realistic detail even at extremely close ranges.
http://www.nzone.com/object/nzone_humanhead_home.html