3D Plotting with Point Cloud

Hello All--

I am trying to create a 3d pdf of a dgn file that has a point cloud from a Lecia Scanner and I cannot seem to get it to work.  When I try to plot all I get is a blank pdf.  If I draw 3D lines they will plot but not the cloud.  Has anyone been successful in creating a pdf of a point cloud?  I appreciate and look forward to your responses.