Operating system: Ubuntu 18.04.1
Graphics card: RX 480
Short description of error
I'm not sure about the scale, because I think the principled shader has to be more physically accurate, the proportion is about 0.65:1.0 for principled and anisotropic shaders. On the other hand, the rotation is shifted by 0.25 anisotropic rotation units or 90º degrees, which rotation is right?
Exact steps for others to reproduce the error