3D artwork is notoriously challenging to do well
3D artwork is especially difficult to photograph well, and are the most problematic photographs for most students. I rarely see 3D artwork in an art school portfolio that is photographed well.
The problem is that 3D artwork varies tremendously from artwork to artwork, so every single 3D artwork really requires its own custom setup in terms of lighting, point of view, and presentation in the slide.
You could be photographing anything from a small ceramic mug to a room-sized installation. The set up to photograph each of these pieces could not be more different.
Most 3D artworks often require more than one photo
Depending on the artwork, the artwork can look dramatically different from a different point of view. This gets complicated though, because often times people have far too many photos that they cram onto a single side, or, the photos that they have look so similar that some of the photos become redundant.
On average two or three photos of a single 3D artwork is generally sufficient to capture the entire artwork.