Figure 5.21 - Ambient Occlusion map
Most of the PBR materials offer the same types of maps regarding
textures. It is a matter of following the same pattern with Image Texture
Nodes and a Principled BSDF. You will be able to create dozens of PBR
materials easily. To save time during this process, it is even possible to
design a template with a material that has all Nodes ready, but no actual
texture files selected.
Duplicate that "blank" material and assign all texture files to start a new
PBR setup. It can save a couple of minutes every time you have to put
together a new material.
Tip: It is also possible to "import" materials from other files in Blender.
Use the File → Append or File → Link options to incorporate or
reference existing materials. Select a Blender file and navigate to the
"Materials" folder. Select the materials you wish to use and reuse them
in any new projects.