Mark Giambruno was a 3D artist, art director and writer. As an early employee of Mondo Media, he worked on many of their game projects and contract game cinematics. He also voiced the Lifty & Shifty characters for the popular internet show Happy Tree Friends in the early episodes of the series. He is the author of two books on 3D graphics and has also done the English rewrite on over 40 US-licensed manga and light novels.