hmm, I didn't know that, and I'd forgotten about that mammoth.
Is modeling such a large amount of work that they would do that, for convenience?
You can consider it an art form
It is not easy.
But like I said, they
could take that model and use it after a few tweaks and rigging... it is just a mesh, and it already represents a mammoth very well... of course, they may decide they want entirely new assets and do one from scratch, or maybe one of the modelers already had a mammoth made before the game assets were created... I'd think the people who do 3d modeling for a living would do the same thing I do with code:save snippets from here and there, and use them in future projects.