The Gnomon School of Visual Effects has made available on their site a presentation that was filmed on October 2nd, 2008 where team members of Digital Domain and Rhythm & Hues Studios explained how they created the effects for the movie ” The Mummy: Tomb of the Dragon Emperor”
For the terracotta army animation they used motion capture and hand animation characters for their closeup fighting scenes. It seems that motion capture is being used more and more in various movies and short films as it was the case with the Greg Mutt animation.
I found this presentation quite interesting and appreciate that the Gnomon School of Visual Effects has allowed the general public to view it.