A hyper-realistic 3D image of a crystal-clear skull formed from polished glass, illuminated by ethereal cyan-blue light that flows through it, casting shimmering reflections and refracted beams. Suspended in darkness with a deep black backdrop, the composition exudes an enigmatic and futuristic aura. Rendered using the octane engine, the surface of the skull captures intricate details, with glimmers and highlights producing a mesmerizing interplay of light and shadow, enhancing its mysterious sci-fi allure.