Shapeshifter who doesn’t follow the environment becomes a doppelganger. Doppelganger knows how to transform to form that he saw, and can copy experience to survive in similar environments. Shapeshifters need something more to access unknown environments and change their form. In movies it all obvious — 3D picture gives a perfect environment/shape match, but in reality, when we speak about people teams, it appears that we can’t even see the surroundings.