<https://s.mj.run/9JEp_zJb06s> Enhance the quality of the image depicting a bathroom with a luxurious onyx stone sink featuring elegant backlighting. Focus on achieving ultra-realism by highlighting the intricate details and textures of the onyx stone. Pay special attention to realistic lighting effects, such as the subtle glow from the backlighting, reflections, and shadows to create a lifelike atmosphere. Utilize the Corona renderer to achieve exceptional photorealism, ensuring that every element in the scene contributes to a visually stunning and immersive experience.