A black tile-able background with paper-like texture.
Source V. Hartikainen
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Prismatic Geometric Pattern Background
Source GDJ
Prismatic Groovy Concentric Background 3
Source GDJ
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Abstract Background Design
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Prismatic Geometric Pattern Background No Black
Source GDJ
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8