cinematic 8k wallpaper, colossal Cthulhu in breathtaking detail, 4k, 8k, positioned in a perfectly balanced composition near a haunting lighthouse perched on a rugged moss-covered rock, the ocean churning violently in a storm, with sharp, crystal-clear focus inducing megalophobia, extraordinarily intricate 4k digital painting, emitting a subtle organic glow, photorealistic with cinematic depth, echoing the quality of a high-budget movie, wrapped in a dark, moody atmosphere, stunning lumen reflections and atmospheric lighting, showcasing subsurface scattering, hyperrealism, and minute detailing, reminiscent of a high-quality DSLR shot, fantastically sharp focus, created with Unreal Engine 5 and Octane Render, 8k.