check out what amnesty international has done using metal railings. they installed a picture that is only visible from the side. the ‘picture’ is actually a series of cutouts on the sides of balusters on a metal railing in London. why they did an installation in London to highlight the case of a man on death row in Georgia, United States, is anyone’s guess! but it looks cool nevertheless

then go check out this wood railing. they’d have a hard time putting a lenticular image on mountain laurel handrails