male teenager full body concept art, cute, short, shaggy brown hair, realistic messy hairstyle, focused green eyes, dark futuristic military jacket, serious humble expression, grey sling bag, green and grey tones, black tones, subtle scifi features, tropical background, amber lighting, deep shadows, ((graphic novel sketch, black sketch lines, low-key cinematic lighting, thick ink outlines, digital oil painting, posterized, cel shading, vector illustration, tenebrism, bold brush strokes, subtle colors))