Caulfield's paintings explore alternative ways of picturing the world. After Lunch was one of his earliest works to combine different styles of representation. In this case, what appears to be a photomural of the Château de Chillon hanging in a restaurant is depicted with high-focus realism, contrasting with the cartoon-like black-outlined imagery and fields of saturated colour of its surroundings. Caulfield deliberately makes the relationship between these varying representational methods uneasy and ambiguous, so that the picture appears more real than the everyday world around it.