How in the world did they do that? That’s the question being asked all over the the world after the highly publicized return of Tupac Shakur at Coachella. The rapper, who died over 15 years ago, joined Dr. Dre and Snoop Dogg on stage Sunday night, performing several songs at the music festival in hologram form.

RumorFix has learned that San Diego company AV Concepts is responsible for the technology that made the magical performance possible. The company says it took several months of design, engineering and “creative consultation” to resurrect Shakur in the form of a 3-dimensional, life-sized holographic projection.

In a statement provided to RumorFix, and written in geek, the company explains how they pulled off the ambitious feat:

“Utilizing the Musion® Eyeliner™ system, a 30′ x 13′ screen was customized by AV Concepts to descend onto the stage in mere seconds between sets of the performance to bring the infamous, deceased singer back to life.

The most critical technical element was AV Concepts’ proprietary Liquid Scenic server that delivered uncompressed media for 3 stacked 1920 x 1080 images, delivering 54,000 lumens of incredibly clear projected imagery that was described as ‘breathtaking’ by numerous media sources.”

Not sure what any of that means, but chances are that if we did, we wouldn’t be writing this story.

AV Concepts says that the life-like Tupac rendering that appeared on stage was done created by award-winning visual production house Digital Domain.