As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
Source Firkin
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
A free seamless background image with abstract texture of green "curtain".
Source V. Hartikainen
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A browner version of the original weathered fence texture.
Source Firkin
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
An abstract pale yellow paper-like background with stains colored in yellow and green.
Source V. Hartikainen
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
This yellow background consists of a pattern of glossy gold buttons arranged in polka dot style on a seamless texture. Here's a pale yellow background pattern. Feel free to use it for your needs!
Source V. Hartikainen
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
Prismatic Basic Pattern 2 No Background
Source GDJ
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Prismatic Geometric Pattern Background
Source GDJ
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten