The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
Detailed but still subtle and quite original. Lovely gray shades.
Source Kim Ruddock
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Prismatic Chevrons Pattern 5 With Background
Source GDJ
From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
Prismatic Hexagonalist Pattern No Background
Source GDJ
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
A white version of the very popular linen pattern.
Source Ant Ekşiler
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Continuing the geometric trend, here is one more.
Source Mike Warner
Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.
Source Firkin
Mostly just mucked about with the colours and made one of the paths in the lead frame opaque. The glass remains transparent.
Source Firkin