Underwater palace dominating the foreground, architecture basking in the glow of bioluminescent sea creatures and a distant sun piercing the depths, schools of fish darting around the intricate coral structures, menacing sea monsters lurking in the softened background, abundant sea plants swaying near the ocean floor metropolis, the palace walls reflecting the tranquil ocean blue, subtle underwater waves rippling across the scene, dual lighting casting dramatic shadows, high-resolution digital painting, ultra-detailed, cinematic.