instantWALLPAPER is typically invoked using instantASSIST. On instantOS, a new wallpaper is automatically generated every "wallpaper-wednesday"
to set a custom wallpaper it should work on all WMs that support feh to set a background. It does depend on instantWM and instantutils to use all features though
set a custom wallpaper on instantOS
instantwallpaper set myimage.png
clear custom wallpaper and return to instantWALLPAPER