1. Make sure the 3D model has been computed (Model->Compute->OK) and rendered (Model→Visualize 3D Formations and Faults→OK).
  2. Go to Project→Export 3D PDF→Select options→OK 
  3. Use Adobe Acrobat Reader to visualize the 3D PDF, other viewers are not supported


NB: drillholes are included regardless of whether they are rendered first.