A SPECIAL REPORT: THE ARTS

REALLY BIG SHOW: An IMAX-type theater planned as part of the new Discovery Science Center in downtown Santa Ana is drawing praise from one who should know: “I can guarantee it will be the world’s best IMAX theater,” says Greg MacGillivray, the Laguna Beach filmmaker who has made a dozen movies in the IMAX (five-story-high screen) format. . . . Why is he so sure? He’s been inside all 73 IMAX-style movie houses throughout the world. “I know everything you can do incorrectly.”