PbrMaterial loading error

[heibaosanwan]

Hi，when I use PbrMaterial for rendering, I find that without additional textures, when metallicFactor=0, non-metallic materials are not rendered with their colors correctly, all non-metallic materials are gray.
The line above is metallicfactor=0, the line below is metallicfactor>0.

[AnyOldName3]

We'll need to know things like what you're loading the materials from and probably other details about your app, too. It's not as simple as all non-metallic PBR materials without textures show up as grey as that's something that works for other people, myself included.