Yes it’s true, in a surprise performance Tupac Shakur appeared as a hologram aka “Pepper’s Ghost,” on the festival stage after a tribute performance of his classic hit “California Love.” The late star also teamed up with Snoop Dogg on “Ain’t Nothin’ Like A Gangsta Party” after an creepy solo rendition of “Hail Mary” from beyond the grave. Sunday, April 15th at the Coachella Festival in Indio, California. The real Tupac of course wasn’t really there in the flesh, but people got to see a awesome hologram of the late Hip Hop legend. We all now wonder how the heck did they do it? John Pepper, a British chemist, adapted a technique conceived by fellow Briton Henry Dircks, for use in the theater by the middle of the 19th century. As a result, the technique was also named after him. So here’s how it works: the audience needs to be able to see into the main room, but not into an adjacent hidden room. In the case of the Tupac “hologram,” that’s the main stage where a real-life Snoop Dogg and Dr. Dre were sharing the limelight. However, hidden on stage is a piece of glass, where the images can be reflected from and pushed into a target area that makes it seem like a single room. But off to the side, behind the glass, there’s a hidden room that has the original object being projected. Check out the video of Tupac, Snoop Dogg’s and Dr. Dre’s banging performance below… » Read more..