Animation techniques: pretty much run-of-the-mill 3D animation with increased emphasis on camera movements.

The greatest challenge we faced was the common human weakness, the insurmountable desire to sleep at least once a week =)

Also the sad reality of modern 3D software lacking any relevant typographic capabilities, which, in the confines of a typography-based project, forced us to blindly master all text elements in Adobe Illustrator before putting them into a 3D environment.