PDFPRCVIEWMODE system variable
PRC View mode
PRC view mode for export of PRC 3D data controls whether the 2D entities are exported separate from 3D entities as standard PDF or whether all entities are exported using PRC. In addition the setting allows to export 3D entities as separate 3D objects or as one unified 3D object.
0 to 2
0: All entities in single view
1: Only 3D entities in single view
2: Only 3D entities in multiple views