...dive into the water and they are learning how to breathe. That was going to be our first shot at fantastical world-building. I remember when I watched Avatar (2009), the sequence where Jake follows Neytiri into the forest and it’s all lit up and I thought what is this place? I want to go there. And this underwater shot was meant to be that. It’s the first time you go into the water and you see these beautiful corals and kids swimming and you want to be there and feel like you are there in stereo. We did a lot of work into making the water look believable and also making it look like you’re in there with stereo. So we used a high frame rate, added tiny particles, and put gel on the camera. And Jim, who has spent so much of his life in water, was there to tell us “Well that looks like something I’ve seen in real life”.