Brad Peyton’s disaster flick San Andreas recounts the efforts of a rescue helicopter pilot, Ray Gaines (Dwayne Johnson), who must rescue his estranged wife, Emma (Carla Gugino), and their daughter Blake (Alexandra Daddario) after a series of major earthquakes and aftershocks rattle Los Angeles and San Francisco from a heretofore unknown fault line. Under visual effects supervisor Colin Strause and visual effects producer Randy Starr, a host of vendors staged widespread destruction and carnage and even a tsunami through several locations. fxguide finds out the ‘How To’ behind some of the film’s biggest effects.

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