Overlays as we know is purely visual. invisibility var is limited to (mv'ble)atoms alone.And this variable doesn't seem to work after inserting it into an overlay.Technically atoms inserted to an overlay is an image of the atom.

Setting an objects invisibility doesn't matter after its in an (over/under)lay list.(at least thats what I believe).

So I was asking if images could have a variable called invisibility, so that you can hide certain overlays (controlled by the see_invisible var).

image.invisibility controls the visibility of an image with respect to see_invisible(mob)