It was a very good weekend for the domestic box office, but a very bad one for 3-D. Cracks are showing again in the rose-tinted glasses as stateside moviegoers largely passed on the opportunity to see "World War Z" and "Monsters University" in extra dimensions.

The 3-D box-office breakdown for Pixar's "Monster University" was the lowest percentage for any animated title in modern history, while Paramount's "World War Z" represented the weakest 3-D showing for an action film, according to a report by B. Riley analyst Eric Wold.

Only 31 percent of the $82 million "Monsters University" debut came from 3-D screenings, while roughly 34 percent of the "World War Z" $66 million bow came from the format.

In contrast, the previous lowest-grossing 3-D action movie, "Captain America: The First Avenger," took 40 percent of its opening grosses from screenings in that format, while Pixar's last animated film, "Brave," earned 34 percent of its domestic opening from 3-D.

That's bad news for Hollywood, which is enamored of the surcharge that comes with 3-D tickets.

3-D equipment manufacturer RealD suggested that they may need to install more 3-D screens to reverse the trend and noted that 3-D's contribution to the domestic openings of many event films have stabilized in the 30 percent to 45 percent range.

3-D hits new low domestically with 'World War Z,' 'Monsters University' - MSN Movies News