strict underwater bottom-up shot, camera submerged and positioned directly below, pointing perfectly straight upward at 90 degrees, clear camera-water-subject relationship, a visible layer of water in front of the lens, near-lens watery texture and refractive distortion, as if looking through water toward the bottles. four transparent glass bottles submerged in pale yellowish murky meltwater, viewed strictly from underneath, their circular bottle bottoms facing the camera directly. the four bottles are slightly loosely arranged rather than tightly packed, with their lower bodies simply tied together by a rough rope loop. the four bottle bottoms dominate the composition, filling about 80% of the frame. water is more turbid, with more suspended particles, small impurities, fine debris, and cloudy yellowish haze from melted ice, not blue, not muddy brown, not filthy. subtle floating specks throughout the water, realistic underwater density, realistic glass refraction, photorealistic, geometric composition, cinematic realism, no visible tank edges, no visible container walls, no corner perspective, no angled view, minimal perspective distortion