Add the Textures to your Blender project

1. Open your existing project or start a new one in Blender.
2. Click File -> Append then browse to your downloaded file and click on it once.
3. Click on Material, select the Node Library material, and click Append from Library.
4. The texture nodes will now be available in the Shader Editor. Click Add -> Group and find the textures by the BRIX prefix.

The PBR Layer TEMPLATE Node

This node is to be duplicated and the duplicates used to create your PBR layers by choosing your textures for the Image nodes within.

Typically, you will create a Mortar PBR layer and a Brick Surface PBR layer and then mix them together with a PBR Layer Mix or a PBR Layer Height Mix.

You can use the Mask output of a Brix generator node to drive the Mix Fac,
or you can use a Math node set to Greater Than with the Height of the Brick Surface Layer in the top, and the Mortar layer in the bottom, and the result will drive the Fac of a PBR Mix giving you a perfect blend of all your PBR textures. For example:

Your downloaded .blend file contains many example materials of Simple, Intermediate, and Advanced complexity.

Installing the Brix PBR Manager

1. Download your brix_manager.zip file and unzip and save the brix_manager.py.
2. In Blender, open the Preferences window, select the Add-ons section, click Install, and browse to and select your unzipped brix_manager.py file.
3. Still in the Preferences window, check the Enable box to activate the add-on.

The Brix PBR Manager will now be available in the Properties panel of the Shader Node Editor.

The manager can create PBR nodes from your textures with the click of a button.

Simply import your textures using your preferred method; I recommend Add->Texture->Multiple Textures in the shader editor. This will allow you to import several images at once.

With your textures selected, the Make Brick Surface and Make Mortar buttons will become active. A Brick Surface node has extra inputs allowing for variation amongst the bricks.

With two PBR layers selected, the Height Blend button becomes active and can be used to combine the two PBR layers with a Height Mix node.