A seamless background pattern with a texture of wood planks. This wood background pattern has vertically arranged planks. You may try to rotate it 90°, to see how it will look like when the wood planks are arranged horizontally.
Source V. Hartikainen
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
Prismatic Groovy Concentric Background 4
Source GDJ
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso