I work as a creator in a advertising agency.
Our designers made a module for the advertising board - a cottage settlement below, on top - a darkened sky with a small number of small stars (a hint that space is somewhere there).

sent to the employer. He called back - all in enthusiasm and "God, how beautiful your designers have made the sky! The stars are flowing straight, this is straight star dust.

We are satisfied with the work and send it to the press. installed in the city. The customer calls back: "Where did the beautiful sky go?".

I say that nothing has changed, that everything is as it should. I printed it and sent it by courier. The customer called back and apologized for the incident. It turns out, for star dust he took dust on his monitor.