very good post about 3d information sir @velimir, as we know that 3D has already been implemented in our life, in fact, A better technology has also been introduced, but still, I love the 3D technology,  when I was a kid I was very fond of playing game Called Super Mario, it was a 2D version but one day i went to my friends home. He had the same game in 3D technology, it was really awesome to play the same game in 3D, I enjoy it a lot and I can never forget it. Nowadays Virtual reality is becoming the future, but still, I love the 3D technology, thanks for this wonderful information about the 3D world.