It's clever for an open air mall, I'll give them that. But when this case study tells me they "created a completed new choice - a product that only an open air mall could offer..." they're half-fibbing with the "created". They rented a machine/bought a service.
Remember Stuart Semple the artists who covered London in "Happy Clouds", remember the flogo cloud machine? Yes, that's what they used.

The first nation branding campaign for Kosovo kicks off with an inspiring 60-second film created by BBR Saatchi & Saatchi Tel Aviv to position the nascent state within the family of nations.
The film focuses on the collective spirit of the youth of Kosovo in building their new country - apt for a nation that is one of the youngest in the world and which has the youngest population in Europe.
The ad closes with the strapline: 'Kosovo – The Young Europeans'

Such an eighties thing, the kids that take flight after eating a candy bar.