Especially when the Lighting and perspective move, the hair has a metallic texture like moving waves. Even though I didn’t give the material a metallic feel, when switching to Detail Lighting in the viewport, it can still be seen that the hair has a very metallic feel.
I copied the project to another computer to check, but it no longer had this metallic feel. I’ve been checking it over and over again for a long time but still haven’t found the reason. Can anyone help me? Thank you very much!
I also found that in computers without the strange metallic feel, there was no useful information in the reflection. Instead, it was as if there was a problem, with only a bunch of constantly flashing noise points.
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In a computer with a strange metallic feel, there are detailed information in the reflection, but even so, the coloring under light is very poor. The reflection here corresponds to the effect of the first picture at the top with hair color.
Metallic reflectance has one key characteristic that is different from other surfaces. It tints the color of specular reflections.
A white light reflecting off a colored metal will output a colored reflection.
On a nonmetallic surface, a white light will reflect and still be white.
The striations you see are from anisotropy. It is also often observed on metals (like the underside of a cooking pan, or brushed metal), but can be observed in any surface that has lots of thin reflective striations or grooves. Hair meets this definition and exhibits this behavior. It causes specular reflections to be stretched out instead of round. Look at the shiny coat of a horse for a good example that can look almost metallic.
But because hair is not metal, light should reflect off the hair based on the lights color, not the hairs color.
