When trying to visulaize curved space, in popular books and science documentaries we seem to always see the 2D rubber sheet analogy.[JPG] I was wondering, is this the best way to convey the idea? This is a computer generated rendition[JPG] taken from a book I have, and although it may be a little harder to draw an analogy from it, I think it's a better visual representation of curved space-time. Is there a good reason people always use the 2D verion rather than the 3D version? What are your thoughts?