Setting the materials
Since Blender 2.79 there is the “Principled BSDF shader” that simplifies the nodes setting quite a bit:
The inputs we will generally use are:
-Base color: usually an image texture, generated or file.
-Metallic: to determine whether the material is metallic or not (1 or 0).
-Roughness: this determines how soft or shiny the reflections will be.
-Normal: here we plug a bump map, generated or file.
Source: the great Blender Guru















