A grand underwater train station with Art Nouveau glass domes towering above coral reef platforms, bioluminescent jellyfish floating through arched ticket windows, vintage steam locomotives resting on suspended rails, Divers in vintage helmets checking illuminated schedules, soft teal and warm amber light filtering through ocean surface above, hand-painted watercolor texture with visible brushstrokes, gouache background in deep ocean blue and soft coral, frame-by-frame animation aesthetic, Cinema 4D render quality, volumetric lighting rays piercing through water, soft shadows, cinematic composition, raytracing, global illumination, 8k