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blur1977 wrote: maybe its my fault,I only put a HDRI map on background,so the anisotropic effect of the lighting cannot be clearly seen. By the way, can the reflection achieve an anisotropic effect under HDRI lighting?

Hi Blur! To see aniso effect you need to have a highlight. At first, please, make your roughness value higher, for example 0.5. Then set anisotropy to 1. And then you may rotate it and see how it works for you