Exhibs Lotte Cinema and CGV are locking horns over rival 3-D formats.Lotte has pacted with U.S.-based Real D to equip 11 screens with digital 3-D capabilities. First title to be released in the new format will be “Monster House” on Aug. 10. The Real D system, which projects images at 144 frames per second, is in use on 350 screens around the world. Meanwhile, market leader CGV, which signed an exclusive deal with Imax in 2005, operates three dual-projector Imax 3-D screens. It plans to expand the number to six. CGV has 279 screens in 38 venues; Lotte ranks second with 249 screens in 32 venues.