character shet or B-E tiles.
with B-E you can basicly paint over it, same with with charactersheet
if you keep 48x48 clean, so it overlap nicely :)
this should work fine if its a few, or make 3 width and or 2 height (6 tiles total).
so the door can be left alone as you can walk under by than.
for now, walking up = most issue, if you stand on the door, it breaks they illusion.
this is optional, but it does make the illusion at least better in its current state.
your game, your choice, just suggestion/feedback to you ^^