What Is CGI?

CGI (computer generated image) is an image made by using computer software such as Maya, 3D Studio Max, Soft Image, Blender. It is usually made for art, printed media, video games, films, television programs, commercials, prototype, illustrate medical devices/human body and mechanic processes. In film industry, CGI is used to creating special effects.

Example of CGI Image

The main benefits of CGI is that an artist can make a content by only using computer. It can save a lot of money by not spending money on actors, set pieces or props. And the quality is often higher than using the traditional method, such as making miniatures for effects shot.

How does CGI work? We need an image file such as CAD/CAM files. Then build and light the environment. Attributes like highlight, transparency, refraction, reflection, depth of field or light fall off. Finally animate the camera, light, object. It is where you want to take shoot from or your camera position.

You can make many things with CGI. But you must be an artist and also a good technican to understand lighting and reflection. The software is very complicated and very expensive.

Read more:
http://en.wikipedia.org/wiki/Computer-generated_imagery