Graphisoft already supports 3D viewing with the Virtual Building Explorer (VBE) add-on:
http://www.graphisoft.com/products/virtual-building-explorer/
although I'm not sure why the web site does not give more "play" to the red/cyan viewing mode which works pretty nicely. (There is also a left-eye/right-eye viewing mode that would require some special hardware I would guess - have not heard anyone talk about that mode.)
So, while not cool new polarized or shuttered 3D glasses, the cheap red-cyan ones work with wherever you have your computer, or connect your laptop to an HDTV.
Cheers,
Karl
PS Attached is a reduced screenshot from the NHS Office Building. Will post an exterior image next. Of course, with VBE, it is entirely a live, dynamic walkthrough, but you can still create static screenshots to send to people.
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