With May 2019 release of Acrobat, converting 3D files to PDFs is disabled. If you try to convert a 3D file (like U3D or PRC file) to PDF using Acrobat, you see a message saying that it’s an unsupported file type.
If you still want to enable the ability to convert 3D files to PDFs, create a registry key (Windows) as mentioned below.
In the registry editor, based on your installed version of the product, go the version-specific location listed below, and create the key Block3DConversion at the location; the key may not be present by default.
For Acrobat DC (Continuous):
- Location: HKEY_LOCAL_MACHINE\SOFTWARE\(Wow6432Node)\Adobe\Adobe Acrobat\DC\FeatureState