How to use a Bump Map AND Normal Map with the Principled BSDF? : r/blender
Principled BSDF for Physically-Based Rendering in Blender
materials - How do I get transparency to work with the Principled BSDF shader? - Blender Stack Exchange
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
How to Use Blender's new ULTIMATE Shader: Principled — Blender Guru