Brilliant, Ultra Realistic, Character Portrait Illustration, headshot view, (Leonardo da Vinci:1.7), bearded man, a thoughtful expression, his most famous inventions, flying machine, tank, helicopter, War Elephant, paddle wheel, watermark, invention notebook, Renaissance era fashion, oil paint, fine detail, chiaroscuro technique, golden ratio composition, deep black background. by: Martin Ansin, Edward Robert Hughes
(Leonardo Da  Vinci:1.7) inventions portfolio. 