I was in my elevator when i saw this... 
As you can see here that reflections are kind of stretched. What causes this? And how can we achieve something like this in computer graphics?
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5That is an anisotropic specular reflection (dominant in 1 direction), an effect usually from brushed metals. – PaulHK Mar 27 '17 at 05:37
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2check here > http://sungsoo.github.io/papers/brdf-mdf.pdf – PaulHK Mar 27 '17 at 06:34