We created the fur using hair creation software Ornatrix. Recently there have been huge advances in the way the hair and fur can be rendered and lit. This is the last piece in the puzzle to creating excellent hair in CG.
Up until recently there have been great tools for styling, curling, cutting, clumping, swishing and swashing hair. ie. getting it into the right shape and having it move correctly has worked well. However, often at the last stage the lighting and rendering has let it down. Now, the lighting we can do on fur is perfect. We can mimic any real world setting and create perfectly solid, photo-real representation of millions of strands of fur.