The last time we spoke with Dr. Barry Sandrew, Founder of Legend3D, was during our NAB 2011 show coverage. At that time, he described how they convert 2D images to 3D. (Think of the process as motion tracking a whole variety of different shapes, then setting each shape to a different depth in the image.) Well, since we spoke, his company has done more than half of the 2D to 3D conversion for the third installment of the Transformers series. Plus, they’ve done the 3D conversion work for Alice In Wonderland, the Shrek series, and the recentGreen Lantern. We invited Barry to join us this week to discuss the whole process of converting a film to 3D, how their system works, and what producers can learn from it.