The idea behind this cube is of a crazy cube that can show 4 different images in its lateral faces without using animated textures; It was tricky working on the corners because they can show only two images.
The cube has three objects, rigged but without controls. The corners are tricky to rotate and animate, but with the animation already done you should get how it works.
Check the attached video to watch the complete animation.
The mesh is unwrapped in one texture without overlap, you can use the photoshop file to insert your pictures easily. The original texture is 2048x2048. The shadow is another mesh, uvspace and texture of 512x512.