Generate a picture that captures the essence of the verse 1 Corinthians 9:7 - 'Who goes to warfare anytime at his own costs? Who plants a vineyard and doesn't eat its fruits? Or who tends to a flock and doesn't drink the milk?' The image should contain three parts: a soldier in the midst of a battle scene, a farmer tending to his vineyard, and a shepherd with his flock. In each scene, the individuals should show signs of not benefiting from their labor, like a soldier who's paying his own costs, a farmer not eating his grapes, and a shepherd not drinking his milk. Please design with a digital art style, while avoiding any use of modern digital art techniques.