The key to exercise solutions in chapter 5a - Reading for the textbook On Screen B2+ - Student's Book with authors Virginia Evans and Jenny Dooley from Express Publishing
Question
Answer the questions using your own words.
Answer
It took Cameron a long time to produce Avatar because the technology he needed to make the film totally realistic was not available. He had to wait for some of the technology to be invented and he invented some himself so that he could make the film the way he wanted to make it.
He developed a special 3D camera. He used a virtual camera and a simulation camera to create a 3D Fusion camera.