A major plot point required an entire CG forrest to sprint from the soil in a single continuous shot providing wood from which the ark would be constructed. Another required massive fluid simulations designed to create the flood that carries the ark away. Both poses unique challenges and required the development of specialized software to achieve the desired result.
Another interesting story point revolved around the animal's arrivals at the ark. For this sequence ILM literally created thousands of unique creatures, many of which were featured grouped together in shots. In fact, one shot in the film required 8,000 animals to be seen walking towards the ark – This single shot was the most computationally intense shot in the company's history.