This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso