Los Angeles-based Munger, Tolles & Olson has been hired to represent the Hollywood studios and film companies behind a handful of box office blockbusters in several copyright infringement suits brought over their use of the MOVA Contour special effects system.

The technology is used to blend actors’ real-life facial features and expressions with digital images, and its use in movie hits “Beauty and the Beast,” “Guardians of the Galaxy,” “Avengers: Age of Ultron” and “Deadpool” is what’s at issue.