Inspired by the B&O Play, I had to make this pattern.
Source Atle Mo
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A cute x, if you need that sort of thing.
Source Juan Scrocchi
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
From a drawing in 'A Life Interest', Mrs Alexander, 1888.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Remixed from a drawing in 'An Index to Deering's Nottinghamia Vetus et Nova', Rupert Chicken, 1899. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
Prismatic Triangular Background Design Mark II 5
Source GDJ