Actually, there's no clouds in it, but I think it looks quite nice.
Source V. Hartikainen
The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Remixed from a drawing in 'Canadian forest industries July-December', 1915
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Dark blue concrete wall with some small dust spots.
Source Atle Mo
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A pale olive green background with a seamless texture.
Source V. Hartikainen
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Zero CC tileable Laminate wood texture, photographed and made by me. CC0
Source Sojan Janso
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim