Not that it will matter much, but another way to prevent images you post, especially 3D images, is to use some format that doesn't enable saving -- even if it's in your cache. Examples include the previously mentioned Flash, but also VET -- that viewpoint thing from some company that used to have something to do with a bunch of our stuff... It loads a little slow on dial up, but it definitely keeps people from stealing images. Even if they have a VET tool...

thou and I, my friend, can, in the most flunkey world, make, each of us, one non-flunkey, one hero, if we like: that will be two heroes to begin with. (Carlyle)