This is a shader for a base material in Godot. This is for Albedo, Normal, Roughness, AO & Height workflow. But it can be easily edited for Metallic workflow as well.

There's two versions, channel packed and non channel packed.

Channel packed expects Albedo+Roughness in a single texture (Roughness in Alpha channel). Normal, AO and Height/ Metallic in another (Normal's R and G only, AO in Blue and Height/ Metallic in Alpha).

The unpacked version expects 5 different maps for each texture. It's recommended to use channel packed version instead. Learn how to channel pack here: https://www.youtube.com/watch?v=tk-mFBKGzjo&t=6s