Fur. It's hard to model in CGI. For a start, it's not one object but hundreds or thousands or millions of them. To make them convincing you have to model them; understanding how they move relative to each other, and to the animal or human that they're attached to
It's really, really hard to create a GGI human face that's convincing. If you know this, then you also know the reason why so many blockbuster movies (Antz, Bug's life, Cars, WALL•E etc) have been about things and not humans
Have a close look at this video clip. It’s an advert for a high-end kitchen worktop manufacturer. Watch it in 720p, and look as closely as you can at the camerawork, the clever use of depth of field, the lighting, and particularly the fresh fruit.
And then reflect on the fact that no cameras - or indeed fruit - were involved in the making of this at all.
This holiday we're re-running some of our most popular articles, in case you didn't see them the first time. Today: have you ever heard the collective sound of several hundred people's jaws dropping? If you've been to a cinema where they're showing the Life of Pi for the first time, then you probably have
Pixar's new animation system allows animators to visualise their characters with all the important detail visible. Like hair!