![]() The holographic performances by Tupac, Janelle Monae, MIA, and others are based on an 1860s parlor trick called Pepper’s Ghost. It’s a simple trick that was used extensively at Victorian fairs, plays, and parties. ![]() You’ve seen it in action at Disney’s Haunted Mansion if you’ve ever been to Disneyland. The Pepper’s Ghost trick is literal smoke and mirrors (well, minus the smoke). A reflective pane of glass is set on a stage and angled down toward a hidden booth. When the hidden booth is illuminated, it reflects an image onto the pane of glass, which then reflects the image toward the audience. At eye level, this image would look squished (remember, the glass is angled). But because the audience looks up at the stage, the image looks “correct,” with a ghostly, translucent quality.Īnd that’s all there is to it-kind of. There also needs to be a source video for these projections. Ideally, the source video is completely still, creating the illusion that a performer is on the stage. Problems with TechĪside from obvious ethical dilemmas, Musion Eyeliner has a lot of technological shortcomings and vulnerabilities: This can be done by recording a performance with a still camera, or by creating an expensive 3D model and then rigging it to sing and dance (the Tupac, Jackson, and Roy Orbison holograms are 3D models).Phase Issues: The most elaborate Musion Eyeliner holograms use multiple projectors to make an image as wide and detailed as possible.But these projectors need to work perfectly with one another. If one falls out of phase, it ruins the image. ![]()
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