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Petro Vlahos dies at 96; advanced blue-screen technology for film
Petro Vlahos dies at 96; advanced blue-screen technology for film

In the 1950s, special-effects pioneer Petro Vlahos laid the groundwork that made a modern movie genre possible — the blockbuster. He did it by vastly improving a composite-image process commonly known as the "blue-screen effect" for the 1959 epic film "Ben-Hur." And he did it again when he created a related technique that made Dick Van Dyke appear to dance among the penguins in the 1964 movie "Mary Poppins." -------------------- FOR THE RECORD: Petro Vlahos: The obituary of special-effects pioneer Petro Vlahos in the Feb. 20 LATExtra section said that his "color-difference system" was used for the chariot race in the film "Ben-Hur."...

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