A 3D image / movie / game (also called 3D Stereoscopic) is based on the need to add extra realism by enhancing the illusion of depth. This technology uses a dual lens on the side of recording, so that records what the left eye and the other to see what the right eye to see.
Although 3D technology has existed in one form or an extended period (over 60), the final results so that the user has become almost insignificant. However, in recent months, there has been an exponential growth of 3D technology, with both films, games and perhaps in the near future, including regular television.
Right now, the basic principle is to send a different image for each eye, just like what happens in real life.
Recently, the 3D avatar technology has given a big boost in power, to the point where companies spend large sums of money in this technology.