To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
There are many carbon patterns, but this one is tiny.
Source Designova
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
Abstract Ellipses Background Grayscale
Source GDJ
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A seamless pattern formed from a tile made from page ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Original seamless pattern with an Inkscape filter.
Source Firkin
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
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Sharp but soft triangles in light shades of gray.
Source Pixeden
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Prismatic Abstract Geometric Background 4
Source GDJ
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
This one needs to be used in small areas; you can see it repeat.
Source Luca