A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
CC0 and seamless wellington boot pattern.
Source SliverKnight
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Abstract Background Design No Black
Source GDJ
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin