Principled BSDF Shader Settings for Steel in Blender - Jigasu.Com
Principled BSDF for Physically-Based Rendering in Blender
Here's a free Principled BSDF Shader guide to help Blender users, an extract from the free PDF guide and YouTube tutorial below, hope you find it useful :D : r/learnblender
shaders - Where/How does the Principled BSDF incorporate Fresnel? - Blender Stack Exchange
All Blender Principled BSDF Settings Explained - YouTube