A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Could be paper, could be a Polaroid frame – up to you!
Source Chaos