These images are stereo-pair. The two images taken in two different angles, similar to the way our two eyes see the world in two different angles to create a three-dimensional depth. Unlike stereogram which is a computer-generated pattern repetition. When you create an object in a 3D rendering software, then why throw away the opportunity to present the images in actual 3D images for us viewers? Until genuine holographic images are real, this is the most easiest method to create images with 3D renderings that they are destined to see with your two eyes.