Manny is not only grumpy, but he is also difficult to draw! Due to the difficulties related to the lack of representation of the animal, it made recreating the mammoth in computer graphics much more difficult.
Since the species in the movie were extinct for centuries, director Chris Wedge and his team at Blue Sky visited the Museum of Natural History in New York and stayed for long hours studying mammoth bones and consult specialist literature and palaeontologists.
The ice age setting in the film was very different from today’s world due to the icy landscapes. To accomplish the complex rendering, the animators used Ray Tracing software designed specifically for the film by the technicians at Blue Sky.
The computer animation in Ice Age went through many stages before becoming the finished movie we all know! Indeed, the animators did not hesitate to use the most "classical" techniques such as pencil and clay modelling necessary for the creation of each of the characters in the film before being scanned using 3D software.