No idea if this is possible but all the above and they are in a hologram so who you see varies with the angle. Or hundreds of tiny portraits replacing the background wavy lines etc on the note.
Not a member of The Register?
Create a new account
Remember me on this computer?
The Register - Independent news and views for the tech community. Part of Situation Publishing
Join our daily or weekly newsletters, subscribe to a specific section or set News alerts
Biting the hand that feeds IT © 1998–2020