QR codes seem to be all the rage these days, and you can even reveal a QR code by filling up a glass with the black liquid known as Guinness, but here we are with something radically different – Korean Emart has placed 3D QR code sculptures throughout the city of Seoul, where it will depend on the position of the sun as the QR code can only be scanned between noon and 1 pm every day, assuming there is no rain, of course. Those are one of the quieter periods at the store, so it is the right time for shoppers to receive discounts by scanning in the QR codes.

Known as “Sunny Sale” (how obvious!) Emart’s effort requires setting up a bunch of what is known as “shadow” QR codes, where it will depend on peak sunlight in order to view the QR code properly. Each successful scan will send you over to a dedicated home page that will put up special offers, with a coupon worth $12 thrown into the mix as well.

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