QUOTE(TungstenCarbide @ Sun 24th May 2009, 1:58pm)
Actually, there are already 3D models in use
, they probably just need to be saved in the correct format.
I'm sure it's just a matter of time...
This could be a good way to sneak free corporate advertising into Wikipedia, actually. Make a 3D model of some really weird sexual act being performed, so that the default view looks completely normal - but when people rotate it and zoom in on the genitalia, a big Wal-Mart or Microsoft logo appears, or maybe a floating link to some retail site where you can buy discounted iPods.
Actually, if the internal link isn't pre-parsed, then people could use that to get around the "nofollow" tags - I'd guess that Google doesn't care if the link is within an "X3D" tag or not, and it might not even care about how well-obscured it is. You could embed all sorts of stuff in there, and they'd probably only be able to see it by opening the .x3d file directly in a text editor (though I'll have to check out some of these authoring programs - there might be ways to find hidden links with those too).
Of course, now that I've pointed this out, en.wp will probably refuse to install or enable this extension, for fear of it being "abused." Oh well... another nice idea out the window, eh?