Caitlin Roper speaking to Alfonso Cuarón on the hardships of making Gravity:
Cuarón: We animated for two, maybe two and a half years before we started shooting the actors. Then we shot the film—and then the poor animators had to start from scratch because they had to base their final animations on what was shot. Someone suggested we just call Gravity animation, but I don’t think we can because there’s a fair amount of live action. And it was really hard work for the animators. After all, you learn how to draw based on two main elements: horizons and weight.