Feh already has the ability to tile an image for the root pixmap, and the ability to set different pixmaps for different monitors. So the ability to set one / some monitor(s) to tile an image and then set another / other monitor(s) to set an image differently comes naturally.
This feature would be useful for people with rare / unusual monitor configurations, where finding an appropriate pixmap to set is extremely difficult.
Feh already has the ability to tile an image for the root pixmap, and the ability to set different pixmaps for different monitors. So the ability to set one / some monitor(s) to tile an image and then set another / other monitor(s) to set an image differently comes naturally.
This feature would be useful for people with rare / unusual monitor configurations, where finding an appropriate pixmap to set is extremely difficult.