3d is nothing but a depth, some ways like example a paper which has a thin depth with a width and a length (a box which had length and width along with depth value, when talking regarding axis, its an object having x-axis y-axis and z-axis). So a 3d is a dimensional array of axis in 3 directions, thus forming a object, thing, a view of depth.

And here we talk about the 3dgraphics, is making use of a 3 dimensional illusion, like a virtual reality. For example, if we take a real human being. A human being consists of some height width and length thus forming a dimension volume, just making the same thing using a computer generated character. If we use that computer generated character in action, like dancing, singing, or some basic action of movement. Then it is said to be a 3dgraphics. Because it basically a virtual generated computer character.

3D computer graphics are works of graphic art that were created with the aid of digital computers and specialized 3D software. In general, the term may also refer to the process of creating such graphics, or the field of study of 3D computer graphic techniques and its related technology.

3D computer graphics are distinct from 2D computer graphics in that a three-dimensional virtual representation of objects is stored in the computer for the purposes of performing calculations and rendering images. In general, the art of 3D graphics is akin to sculpting or photography, While the art of 2D graphics is analogous to painting. In computer graphics software, this distinction is occasionally blurred; some 2D applications use 3D techniques to achieve certain effects such as lighting, while some primarily 3D applications make use of 2D visual techniques.

Generally now a days, mostly the 3dgraphics are being used for Film and video. And other than these people use for television broadcasting, medical, Industrial, Science fiction, Educational and many more. The way of using computer 3dgraphics give much more real time representation of things to understand and educate by seeing them. With a less implementation of time the final exploration of the thing can be expressed to person, Even if he is an uneducated layman.

Since I had worked at so many places, and found difficult for people to understand the things. Now days there are so many things and ways to understand and learn things from Internet. You can ask your doubts or any clarification doubts regarding to the media and 3dgraphics. I help people to educate by knowing the facts of an 3d and its effects of support, which helps in very expressive modes.