Cougar; Has it right. True three dimensional imaging requires three camera angles and to see it, three projecting points. This is a three dimensional universe with time as a added reference. Not a forth dimension as the others are spacial. Time is not. The standard photo is two dimensional.
About holographic imaging... A good graphics card and a reasonable computer can give the appearance of three dimensional imaging. It is not. It just looks like it. Your eyes can be fooled.