(CNN) -- Ray Harryhausen, the stop-motion animation and special-effects master whose work influenced such directors as Steven Spielberg, Peter Jackson and George Lucas, has died, according to the Facebook page of the Ray and Diana Harryhausen Foundation. Harryhausen was 92. The page did not offer a cause of death. Harryhausen's pioneering work on such movies as "Mighty Joe Young," "Jason and the Argonauts," "One Million Years B.C." and "Clash of the Titans" (1981) was widely praised for its ability to blend stop-motion effects -- models filmed one frame at a time -- and live action. In "Jason," for example, the hero has a battle with a group of skeletons that emerge from the ground and take on the Greek warriors.

Harryhausen called his format "dynamation," and though it looks somewhat crude by today's computer-generated standards, it still packs a punch -- and other filmmakers remain agog by

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