My film credits include Star Trek 6, Jurassic Park, The Flintstones, Casper and Jumanji. My name is Verna Harrah. The plate work was difficult because the shots involve lots of interaction between the snake and principal actors. This is some of the most complex computer animation every attempted. Most of the shots Eric and John have to accomplish have real actors interacting with a computer graphic snake.
Snakes are extremely difficult to animate.
They don't have arms or legs like most creatures do and there center of gravity changes from moment to moment. You might say that, but they took it a bit farther and did many more shots. There are actually two snakes. One is 25 feet and the other is 40 feet. A group of documentary filmakers go down to the Amazon to do a documentary on a local tribe.