A hyper-realistic 3D image of a crystalline glass skull illuminated from within by ethereal blue light, casting intricate patterns and a gentle glow that accentuates its transparent form against a deep black void. Rendered using Octane for heightened realism, the skull exudes a mysterious ambiance with subtle hints of futuristic technology, enhanced by faint reflections and refractions on its smooth, polished surface, creating a mesmerizing sci-fi atmosphere.