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How to add Hollywood special effects to your videos

In an undated handout image, Apple’s iMovie software. Video-editing apps like Apple’s iMovie for the Mac let you replace the green or blue screen you used for your clip’s original background and replace it with a different scene. (Handout via The New York Times) — NO SALES; FOR EDITORIAL USE ONLY WITH NYT STORY TECH TIP BY BIERSDORFER FOR MAY 15, 2019.  ALL OTHER USE PROHIBITED. — XNYT39 XNYT39

Make “green screen” movies using your smartphone, inexpensive software and a large piece of cloth.

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