On the lush alien world of Pandora live the Na'vi, beings who appear primitive but are highly evolved. Because the planet's environment is poisonous, human/Na'vi hybrids, called Avatars, must link to human minds to allow for free movement on Pandora. Jake Sully (Sam Worthington), a paralyzed former Marine, becomes mobile again through one such Avatar and falls in love with a Na'vi woman (Zoe Saldana). As a bond with her grows, he is drawn into a battle for the survival of her world.
What is CGI?
CGI, short for Computer Generated Imagery, is the application of computer graphics to create or contribute to images in art, printed media, video games, films, television programs, commercials, videos, and simulators. The visual scenes may be dynamic or static, and may be two-dimensional (2D), though the term "CGI" is most commonly used to refer to 3D computer graphics used for creating scenes or special effects in films and television. CGI can be commonly used in big budget films and are able to use it with very little limitations, Horror Genres however cannot create this effect using CGI without it looking fake.
Avatar.....
In movies like “The Lord of the Rings,” “Avatar,” and “Pirates of the Caribbean,” hundreds of unique and fascinating characters have been created thanks to the brilliant synergy of performer and animator. The actor drives the character, providing its voice, emotions, physical movements, facial expressions etc. The animator provides all the externals of the character and connects the digital dots to make the performance fluid, seamless and lifelike. Both are integral to and inseparable from the creative process.