A thought I’ve had- more something I would have done long past when my living space was thick with energies (that subtle and so distinct smell of Dr’s Blood- just the faintest haze in the air makes the entire space a portal)… anyway
What about getting some of the UV-blacklight reflecting paint (I forget what its called)… which I think can be a “clear” vanish
— so Paint as Big a Penta on the “blank” Wall as you want… once it dries, its not seen, and then turn on a BlackLight- and it lights up (whitish-bluish glow for ex), and then switch off the wall… click… Occulted- Hidden In Plain Site (sight)
therefore could just put it on the wall (assuming you have a free wall space (if covered in hanging pictures- then behind a picture/poster) just the idea of being able to paint it directly on a wall, which should give alot of space-size ?
< < later edit: just to comment the above came to mind, and appealed to the “hidden in plain sight” -as well as no “poster board” needed… one could use “butcher paper” that paper on big rolls… anyway- in terms of size, I’d say about 3inches diameter to about 3feetdiameter… smaller than 3 inches it seems would be Seen by the eyes as an item in visual field, vs an entire focal… thus 4or5inches would be about “small figurine” size- just a thought > > to make my response more tied to the original question