This is a little Blender shader node group which converts the output of a Bump node into a tangent space normal map. Useful if you want to create a normal map from a shader without the need for baking ...

One is "extreme PBR" it's A PBR material pack kinda thing for blender it's the biggest 1 they have these very specialized node groups called Nexus nodes ...I wondered if they could use your optimized ...