Simple, impressive, who dictates the law in this paper is the light. Light as visual effect, the light as object oor shape that issues it, the light when this is missing... Magically, when turn off the lights. Light+Light will continue to issue the light, but only at certain points. Discover them!
A phosphorescent paint is applied by hand on the luminescent points of the graphic.
The painted part of this luminescent wallpaper will charge with natural or artificial light, lighting up in the dark.