A bioluminescent deep-sea cave at midnight, massive crystalline formations emitting ethereal blue-green glow from deep ocean waters, exotic anglerfish and ghostly lanternfish floating among towering coral spires, bizarre naked snailfish and iridescent comb jellies drifting through dark abyss, absolute darkness punctuated by living light sources creating dramatic volumetric glow and prismatic color shifts on mineral surfaces, rendered with Unreal Engine 5 raytracing and PBR materials, reimagined as hand-painted Studio Ghibli animation with visible brushstrokes and watercolor texture, deep midnight blue and electric cyan gouache color palette, cinematic low-angle composition with strong atmospheric depth and mysterious alien underwater cathedral atmosphere