The build is from before Windows 11 was unveiled, compiled in May 2021. It includes unused variants of Windows 10's and Windows 11's default wallpaper.

The hero wallpaper, as Microsoft calls it, actually received a few variants thoughout Windows 10's life, including one tailored for light mode, and one made for Windows 365.

The wallpaper was created by designer Bradley Munkowitz, also known as GMUNK, who explains in a YouTube video that he and his team took thousands of images of the Windows 10 logo and combined all ...