Such materials include brushed stainless steel (above), horse hair, velvet (below), wood grain, or a wet road.
Bearded Man with a Velvet Cap, 1645, Govert Flinck Dutch, Met Museum, NY
Read more at the Wikipedia page on Anisotropy
Anisotropic Material
Some surfaces reflect a different value depending on the angle they're seen by the viewer. This surface property is called anisotropic.
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