This turned out pretty well using a short lens (35mm), and keeping the camera parallel to the piece.

Cross your eyes until you can bring the combined "middle" image into focus. I thought the cross-eye 3D images I've been seeing on Flickr would be perfect for communicating the physicality of sculpture on the internet.

I really like the effect - suddenly there's a tiny sculpture in your screen! You can get a similar effect by focusing past the images, but you need to switch the images to make them work. If you try the "long-view 3D" on this image, the door appears cut into the panel in a weird way.