Detailed oil painting in the style of Boris Vallejo, dark-fantasy mood

Detailed oil painting in the style of Boris Vallejo, dark-fantasy mood, photorealistic cinematic touch. 8k masterpiece at dusk in a ruined war- city, seamless face replacement from provided reference preserve identity, expression, skin tone and lighting with no visible seams. Hero in a high-tech exoskeleton with original futuristic weaponry fighting a monstrous attacker. Dramatic epic lighting, low-angle dynamic action 4k, strong motion, flying debris and sparks, cinematic depth of field. High-detail armor and environment textures, realistic skin tones matching the reference, natural shadows and reflections. Oil impasto textures and subtle brushwork combined with sharp material detail. Avoid graphic gore; use original designs only s 1000