The core of this trick is a four-sided pyramid with angled sides. This pyramid is typically made from a transparent material like plastic (often cut from an old CD case). When you place this pyramid in the center of your phone, the angled sides reflect the images from the screen toward the center. The result is an optical illusion where four separate reflections combine in mid-air to create the appearance of a single, three-dimensional object.
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Be extremely cautious of apps like "HoloFlash" or "Lumina Flash Pro" that are often promoted through viral social media ads but are in official app stores. The core of this trick is a four-sided
: You will need a clear plastic sheet (like a CD case or transparency film), a pen, a ruler, and tape. The result is an optical illusion where four