A small island with a castle on top of it in the middle of the ocean

(8k, RAW photo, best quality, masterpiece:1.2), (realistic, photorealistic:1.5), octane render, ultra high res, ultra-detailed , professional lighting, photon mapping, radiosity, physically-based rendering, ue5, ((island sanctuary)), ((ancient fallen kingdom)), ((reflections in water)), ((raytracing)), ((drowned city)), landscape,

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