A visceral cinematic medium close-up portrait of a terrifying, decaying zombie walker with gaunt, necrotic features, its skin pale and mottled with patches of rotting flesh, sunken clouded eyes staring vacantly, and jagged, yellowed teeth exposed through a snarl, its head covered in matted, filthy gray hair, wearing a heavily soiled and tattered button-down shirt stained with mud and dried blood, the background reveals a blurred horde of other undead figures shuffling through a ruined post-apocalyptic urban street under a flat overcast sky, shot with a shallow depth of field to isolate the grotesque main subject, emphasizing raw skin textures and practical horror makeup effects, 8k resolution, gritty dystopian horror aesthetic.