Project Neon allows you to use Autodesk’s servers to render your Revit models. However, Web Update 1 for Revit broke Project Neon. There is now an update to the add-in so that it will work with Project Neon again. For more information see the Autodesk Labs blog post.
Autodesk Labs Project Neon – Revit 2012 – Web Update 1
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