Lumen Pool — Glowing Underground Lake

A 10-second otherworldly cave film, 16:9: an underground lake glowing from within, a drone skimming its mirror surface. The hook: the water is a mirror of a crystal constellation ceiling — and the drone's own reflection flies beneath it.
0-3s: Darkness, then the glow: an underground lake lit from within by dissolved crystal, the water breathing soft cyan. The surface is a perfect mirror of the crystal ceiling's constellations — a thousand mineral stars doubled. The drone skims in low, its own reflection flying beneath it, the two drones converging on the mirror line.
3-6s: The drone's downdraft stirs ripples, and the reflected constellations break into shimmering fragments — reforming, breaking again. Blind white fish dart through the light below, trailing ripples. Stalactites pierce the mirror, each ringed with expanding circles of disturbed stars.
6-10s: At the far shore the glow intensifies — a submerged crystal garden rising from the depths, facets catching the cyan light and throwing it in slow pulses. The drone climbs gently, the whole glowing lake spreading beneath it like a lit map of the underworld. Hold on the glow. End.
Craft: the lake is the subject — black water, cyan inner glow, a mirror surface; the crystal ceiling's constellations; the submerged garden as the payoff; blind white fish as living accents. Camera: smooth low skimming flight, mirror-line tracking, one gentle climbing reveal. Lighting: cyan glow as the sole source on black water, pulsing from the crystal garden, soft and diffused. Atmosphere: serene, otherworldly, luminous — a cathedral of light underground. Style: smooth drone cinematography, reflection detail, deep-black grade with cyan highlights, 10 seconds, 16:9.