Darkness engulfs me right before I step into a dream. The Oscar-winning Mexican filmmaker Alejandro González Iñárritu guides me from a pitch-black hallway into an open space, where beams of light and smoke, interspersed with sounds from the streets of Mexico City, create a vortex into a unique cinematic experience. Inside the Los Angeles County Museum of Art, Iñárritu is giving me a tour of his new installation “Sueño Perro”: a sensorial celebration of his 2000 debut film, “Amores Perros,” in honor of its 25th anniversary. The only physical elements on display are six film projectors and the celluloid that contains frames of unreleased footage, which are shown on screens of different sizes around the room. Detached and unburdened by the need of a narrative, the images simply exist. “I love doing installations,” Iñárritu says in Spanish. “It’s like playing a game with your friends. And it’s liberating for me, because I don’t have to think about selling tickets.” Before arriving at LACMA, his “Sueño Perro” mesmerized audiences in Milan, Italy, and in his hometown …