Visual effects or VFX in its most elementary form are digitally manipulated live action footage. In other words, a visual effect is the optimum use of computers to add and remove special effects or anything that wasn’t originally within the shot.
A visual effect or impact is the integration of live-action footage and generated imagery to create realistic environments. However, the creation of such imaginary would be dangerous, costly, and simply impossible to capture on film.
3D has become an inevitable part of life and it's becoming popular day by day. CGI (Computer Graphics Imagery) or extensively known as the 3D Animation process, creates special effects in movies, arts, video games, mobile games, television programs, and advertisements. The 3D images are not hand drawn, but are mostly created using specific 3D software. The structure being built on three axes provides- vertical, horizontal, and the depth effects.