I am unfamiliar if PP uses its own native PDF resources to interpret, or it if leans on Adobe Reader functionality to accomplish its task.
Does Adobe Reader open your 3D PDF correctly? If not, verify its preference:
Edit -> Preferences -> 3D & Multimedia category -> [√] Enable Playing of 3D content (located at the top).
If this doesn't help, sorry but I'm at a loss. You're right that we're not a PP forum.
I opens it just fine in the PDF form... I appreciate your response though.
And thanks for confirming that we're not in a PP forum. Wasn't quite sure at first