Transformers 2 was definitely the most challenging project I've worked on so far. It was my first show as a Lead Animator, so my responsibilities expanded beyond the regular duties of completing animation shots.
I had to attend meetings and video transmissions with the director, relay shot feedback to all the animators who worked on the sequence I was leading, make sure that the animators had everything they needed in order to complete their shots, and much more. So, I had to fit a lot more into the same schedule.
I happened to work on a sequence which was all CG with no actual live-action plates, so the director had a lot of freedom in terms of camera setups. This was also very challenging because of that said freedom. We went through a lot of different versions until the director's vision was met, but at the end of the day it was worth it. Michael Bay has a great eye for visual composition, and I learned a lot from listening to his feedback.