How to Enable Immediate 3D Display in Adobe Reader

By default Adobe Reader displays yellow security warning banner for 3D PDFs.

Users can change the default setting in Adobe Reader to allow for 3d content. Go to Edit > Preferences > 3D & Multimedia and then select the Enable playing 3D content checkbox.

Further information on enabling 3d content in Adobe Reader can be seen - Enable 3D content in PDF, Adobe Acrobat and Reader