When I did my internship at regime.nl in 2016/17 I had the chance to participate in creating artwork for Black Sun Empires album "The Wrong Room". One of the major challenges was to build from scratch a fully functional, waterproof studio. For months we experimented with water and paint in this self built room. These experiments leading up to a sophisticated routine in combination with high speed flashes made possible the amazing amount of detail in the final image.
Check out the Making-of here.