As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Prismatic Groovy Concentric Background 4
Source GDJ
There are many carbon patterns, but this one is tiny.
Source Designova
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
A simple circle. That’s all it takes. This one is even transparent, for those who like that.
Source Saqib
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Prismatic Hexagonalism Pattern No Background
Source GDJ
A version without colours blended together to give a different look.
Source Firkin
Background formed from the original with an emboss effect.
Source Firkin
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
A seamless pattern of "sewn stripes" colored in light gray.
Source V. Hartikainen
Zero CC Mossy stone tileable texture, photographed and made by me. CC0
Source Sojan Janso