I have witnessed that type of confusion about photos of artwork. Multiple views are necessary for sculpture. Most show entries will accept more that one slide of sculpture. Take photos from several positions. Lighting can be used to promote the qualities to which you want to draw attention.
Scale is sometimes a problem.
Perhaps a large sculpture can be shown with people near it. More than likely you will want to represent the work alone. Lights must also be used to enhance characteristics of the piece, like texture and materials. Use a racking light from the side to emphasize a surface texture. Use light and shadow to show off the form of the piece.