a beautiful mermaid looking at the sunken city of Atlantis under water, rays of sunlight, stunning grand architecture, fish and sea creatures in background, art by Tim Hildebrandt, 8k octane beautifully detailed render, post-processing, extremely hyperdetailed, intricate, epic composition, grim yet sparkling atmosphere, cinematic lighting + masterpiece, trending on artstation, very detailed, vibrant colors, Art Nouveau, volumetric god rays, deep underwater scene, sharp focus, smooth, dizzy, moody