It seems that at the moment there really is no way to do this, I know that someone tried, but it did not work out very well.
In the first link you will find out why it is not available, and the second - to an attempt to use 3D objects on Zune.
Lack of 3d - Zune
3D attempt
It seems to be something that may not be available for a while, if at all.
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