We built different characters for the documentary: reptiles, birds, mammals that all have their particularities.
Therefore, different assets types have been set up: plantigrades, digitigrades, unguligrades, to make the baluchitherium (or paraceratherium), the sarcosuchus (a kind of crocodile), the geryonis, the mylodon, the megatherium, the psilopterus, the archelon (a turtle species), without forgetting the titanoboa !
This required a precise anatomy research in order to fine tune the skeletons and the specific rigs of each animal.