A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
There are many carbon patterns, but this one is tiny.
Source Designova
Retro Circles Background 4 No Black
Source GDJ
Background pattern originally a PNG drawn in Paint.net
Source Firkin
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
From a drawing in 'Jardyne's Wife', Charles Wills, 1891.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
One more sharp little tile for you. Subtle circles this time.
Source Blunia
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Abstract Geometric Background 3
Source GDJ
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov