WPF FlowDocument, Viewport3D, Adobe 3D PDF

Question

Hello everybody,

In my little test application i created a FlowDocument instance and added a simple Paragraph containing some text.

In the second step i added a BlockUIContainer containing a Viewport3D to the FlowDocument and some more text.

It all displays well. I can display the FlowDocument inside a FlowDocumentReader and see the text i´ve added as well as the model of the Viewport3D with its animations.

Now i got the following question:

Does anyone know how i could convert/print the whole scene (text and viewport model) into PDF 3D format?

Are there any 3rd party tools that could do that for me?

Any help would be very appreciated! Thank you very much in advance.