Tilable brick texture maps. The bricks have the typical random clay color typical in older buildings and structures.
As always, you can use Adobe’s free Substance Player to export custom versions of the textures or to generate different patterns to suit your needs.
You can download the Player here: https://helpx.adobe.com/substance-3d-player/home.html
Included are the following;
The shader doesn't use a metallic map so this is not included but the value should be black or let's say 0 metallic