Sinister, grinning Medusa with a visage of cracked alabaster skin and a backdrop of a dusty limestone cliff, exuding horror as serpentine hair slithers forth with lifelike motion. Her form is chiseled and dramatic, depicted in hyperdetailed, high-res clarity with intricate details and sharp focus. The scene captures the eerie ambiance in HDR and 8k quality, highlighting perfect hands and lifelike eyes that add to the photorealistic depiction. The skin texture is meticulously rendered with subsurface scattering, achieving a stunningly realistic appearance against a richly detailed background.