Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
A seamless pattern formed from background pattern 102
Source Firkin
Vector version of a JPG that was uploaded to Pixabay by theasad121
Source Firkin
A free pink background pattern.
Source V. Hartikainen
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
From a drawing in 'A Guide to the Guildhall of the City of London', John Baddeley, 1898.
Source Firkin
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
The rectangular tile this is based on 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