Prismatic Abstract Background Design
Source GDJ
You guessed it – looks a bit like cloth.
Source Peax Webdesign
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
"Beige Stone", Tileable Texture.
Source V. Hartikainen
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
A background pattern with blue on white vertical stripes.
Source V. Hartikainen