a luminous springtime fairytale of beautiful realistic mermaid women frolicking among octopuses and fish and coral and seahorses in the romantic courtyard of an underwater baroque white marble cathedral with stained glass windows. neon light, masterpiece 4k digital illustration by ruan jia and mandy jurgens and william-adolphe bouguereau, award winning, artstation, gustave dore' background, intricate details, realistic, panoramic view, volumetric lighting, hyperdetailed, 8k resolution, golden hour, intricate art nouveau, smooth, sharp focus, rendered in unreal engine 3