Petro Vlahos, 96, a special-effects pioneer who developed the blue-screen and green-screen process that allowed Dick Van Dyke to dance with penguins in Mary Poppins, the blue-skinned Na'vi to live ...
LOS ANGELES (AP) — Petro Vlahos, a two-time Academy Award winner whose blue- and green-screen technique on movies like “Mary Poppins” and “Ben Hur” made the modern blockbuster possible, has died. He ...
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