shaders - Weird shadow colors / saturation in a Copper material (Principled BSDF) - Blender Stack Exchange
Why won't my mask work with Principled BSDF? - Materials and Textures - Blender Artists Community
Blender 2.8 How to use PBR textures with principled bsdf Cycles/Eevee - YouTube
node editor - Add two Principled BSDF with alpha - Blender Stack Exchange
Make the Principled BSDF node more beginner friendly — Right-Click Select
Principled BSDF reflection affects whole eye - Materials and Textures - Blender Artists Community
Basic Principled BSDF – Blender Knowledgebase
Help rotating in principled BSDF : r/blenderhelp
The new Principled BSDF model in Cycles - YouTube
Principled BSDF — Blender Manual
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