When opening an exported 3D PDF file created in Studio Designer in Adobe® Acrobat® Professional or Adobe® Acrobat® Reader, you do not get a preview right away.
Acrobat® Professional and Acrobat® Reader display a warning about 3D content being disabled.
When opening a 3D PDF file, you get the following message:
In Adobe® Acrobat® Professional or Acrobat® Reader, either click the Options button in the warning message on top to select Trust this document one time only or Trust this document always to see its contents. Or,
Open the Acrobat® Preferences panel and select 3D & Multimedia from the Categories panel on the left to enable the check box Enable playing of 3D content. This would never pop up the before mentioned warning anymore.