White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.
Source Firkin
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Prismatic Abstract Geometric Background 4
Source GDJ
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
This was formed by distorting an image of a background on Pixabay.
Source Firkin
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić