Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
A comeback for you: the popular Escheresque, now in black.
Source Patten
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
A version without colours blended together to give a different look.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Remixed from an image on Pixabay uploaded by Prawny
Source Firkin
Prismatic Groovy Concentric Background 4
Source GDJ
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
Nasty or not, it’s a nice pattern that tiles. Like they all do.
Source Badhon Ebrahim
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Hexagonalism Pattern No Background
Source GDJ