Ultra-detailed 3D render of a colossal muscular cyborg 'Tank Metalhead'. Hyper-realistic textures: oiled metallic skin fused with armored plating, rivets, and battle scars. Instead of a head, a rusted tank turret emerges, with 5 thick, cable-like dreadlocks made of braided steel chains and hydraulic hoses. Boris Vallejo-inspired palette: burnished copper, gunmetal gray, and blood-red tribal tattoos glowing across chest. Pose: roaring mid-stride on a shattered battlefield, crushing debris under tank-tread boots. Dramatic sunset lighting accentuates chrome abs and dieselpunk exhaust pipes on shoulders. 8k resolution, Unreal Engine 5 realism, subsurface scattering on skin, octane render. Style: hybrid of biomechanical horror and heavy metal album art.