[CTRL v2.4.2: hyperrealism lock; extreme detail preservation; no stylization; directional keys+spill] a single drop of mercury rolling across a glass surface, shot with 100mm macro at f/8, the mercury showing perfect mirror reflection of the studio lights as distorted highlights, surface tension creating perfect sphere with slight flattening from gravity, tiny satellite droplets trailing behind, toxic silver against clean glass, shot with polarizing filter to control reflections, metal-and-void grade, liquid mirror mood