The process was very simple to conceive
First, the creator, who goes by the name shige-ruuu, hacked into his desktop humidifier and hotwired it to pump out a thick volume of fog.
To compensate for the increased mist production he created an adapter so that a 500mL bottle of water could be attached. If you look closely, you’ll see him using a sex lady bottle, which he says gives the best fluid dynamics.
Then he built a rectangular box, which is meant to disperse the mist evenly, and mounted it to the wall. The box and humidifier were connected with a vacuum tube.
A projector was set up behind the box to send the images from the computer.
With everything set, it was time to flick the on switch.
It wasn’t long before the screen of water vapor started gently descending and the PC’s display could be seen. Even the standard Hatsune Miku music video test was performed with adequate results.
However, the device is far from perfect. It’s easy to see from the demonstration that the mist couldn’t remain thick as it neared the bottom of the screen and produced an often flickering image.