AutoCAD 3D Objects are not displaying with the correct Object Enablers installed.
The solution is to use the DWG Open Options - Proxy Object settings to get the AutoCAD 3D Objects to Display in MicroStation.1. Select the DWG file2. Click on Options3. Go to Advanced > Custom/Proxy Objects > Custom Objects Display Mode = Render.
4. Click OK5. Click Open
If the AutoCAD 3D Objects still wont display in MicroStation then check the following.
A. Make sure you have the correct version of AutoCAD Object Enablers installed.B. Make sure that in AutoCAD the DWG file was last saved with the System Variable PROXYGRAPHICS = ONC. Make sure the object enabler is designed to save the graphics in response to this system variableD. Make sure that the Proxy Graphics looks as they should in AutoCAD in f.ex. Wireframe or Mesh.
For more information on AutoCAD Object Enablers see this WIKI: