Embossed lines and squares with subtle highlights.
Source Alex Parker
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
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
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
There are many carbon patterns, but this one is tiny.
Source Designova
"Beige Stone", Tileable Texture.
Source V. Hartikainen
A seamless pale yellow paper background with a pattern of animal tracks.
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman