I decided it's time I practiced and improved my skills in Substance Designer, which I previously didn't use very often. So after experimenting with different materials and methods, here's a procedural and customizable material created in Substance Designer of an old brick wall with different variations, including wooden windows with mashrabiya-style patterns, an old wooden door, and Kufic tile calligraphy art.
Rendered in Marmoset Toolbag using tessellation and displacement on low-poly flat surfaces.