-   LNXPCS: sadly the main repo was taken down (idgaf license)
-   NASA:
    -   https://www.jpl.nasa.gov/galleries/visions-of-the-future/ (JPL Image Use Policy)
    -   https://science.nasa.gov/exoplanets/immersive/galaxy-of-horrors/
-   David Revoy: https://www.peppercarrot.com/xx/wallpapers/index.html
-   Mississippi:
    https://publicdomainreview.org/collection/maps-of-the-lower-mississippi-harold-fisk/ (Public domain)
-   geometrical-psychology:
    https://publicdomainreview.org/collection/geometrical-psychology-or-the-science-of-representation-1887/ (Public domain)
-   gnome: the gnome-backgrounds package (CC-BY-SA 3.0)