male teenager full body concept art, cute, short, short shaggy brown hair, realistic messy hairstyle, focused green eyes, dark futuristic military jacket, serious humble expression, grey single-strap sling bag, dark green and grey tones, black tones, dark 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, pallette knife painting, posterized, cel shading, vector, tenebrism, bold brush strokes, subtle colors, subtle lighting))