Any product including food in controlled lighting. Food photography is perhaps the most challenging. For appealing food photography, food, the props and the garnishing needs to be done specially for photography. Lighting is crucial, so it understanding food technology. Because texture, colour, everything matters. The key is to make food and beverages appetizing.
Even controlled lighting is tricky. Needs a keen eye, lots of patience, and technical perfection to make studio lighting work to your advantage.