Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
White circles connecting on a light gray background.
Source Mark Collins
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Crossing lines with a subtle emboss effect on a dark background.
Source Stefan Aleksić
A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
If you want png files of thisu can download them here :
Source Viscious-Speed
Prismatic Snowflakes Pattern No Background
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Green Web Background, Seamless tile.
Source V. Hartikainen
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Prismatic Basic Pattern 2 No Background
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
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin