Computer graphics

Computer graphics is common in our life. CG was established in a movie, a television commercial picture, an illustration and the comics as a general method used for every image production. The expression of non-reality world became easy, so CG got possible to represent the virtual thing. For these reason, it's applied in simulation that is difficult to carry out in reality. For example, it is used in cartography and an image of the building. How do you challenge CG once?