post-apocalyptic setting, Fallout 4, mysterious serum, glowing vial, green liquid, vintage label, worn leather pouch, rugged survivor, male, (30yo), muscular build, scarred face, determined expression, brown trench coat, combat boots, gas mask, holding serum, radiated ruins, dead trees, overcast sky, ambient radiation glow, dilapidated buildings, distant view of the Prydwen airship, dynamic angle, atmospheric lighting, desolate mood, detailed textures, rust and grime, 3/4 view, cinematic composition.