underwater scene, Subnautica game, exploration, diver character, futuristic scuba gear, collecting lithium, rocky seabed, alien aquatic plants, bioluminescent creatures, resource nodes, cave systems, submarine vehicle in background, ambient lighting, murky water, 3/4 view, detailed textures, survival theme, action pose, resource gathering, high-tech tools, vibrant coral reefs, schools of exotic fish, eerie atmosphere, first-person perspective, HUD interface elements visible, immersive environment, realistic underwater physics, soft shadows, sunbeams penetrating water.