Looks like an old wall. I guess that’s it then?
Source Viahorizon
A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.
Source V. Hartikainen
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
Formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
Fake or not, it’s quite luxurious.
Source Factorio.us Collective
Zero CC Mossy stone tileable texture, photographed and made by me. CC0
Source Sojan Janso