Create a sub-directory for the tutorial called hx_unit. Copy the hx_unit_asm.x_t file (which contains the geometry definition) into the working directory. The file is supplied as part of the documentation download with release versions of STAR-CCM+ and can normally be found in the /doc/tutorials/hxUnit directory.
Launch STAR-CCM+ and start a new simulation as normal. Select File>Import Surface... so that the Open dialog will appear. Use the navigation tools in the dialog to locate the working directory select the hx_unit_asm.x_t file from the list box, then press the Open button.
The CAD import options dialog will appear:
The default options will be used in this case, which will result in one boundary for all the faces in a body and one region per body. Feature curves will also be created automatically based on sharp edges of 30 degrees or more.
During the import process, the Parasolid Transmit file geometry will be translated into a triangulated surface representation with a total of two regions and one boundary surface per region. Feature curves will also included for each region based on the supplied angle. Using the above combinations, the import process will result in regions that are distinct and separate from one another and do not share any surfaces.
An Import representation node will also be added to the Representations node. Click on the Representations>Import>Regions node if you want to see a summary of the edges and faces used for the surface representation.
As no unit specification is required for a Parasolid Transmit import operation, the model is automatically converted to use meters as the dimension units.
The geometry will automatically be shown in the graphical display window once the import process is complete. We will turn on the mesh display option for the surface:
Use the mouse buttons to rotate the model to approximately as shown below:
The triangulation performed during the translation process can now be seen. Although relatively coarse in planar areas, a finer faceting is used on curved and cylindrical surfaces in order to preserve their definition. To view the internal details of the geometry, you can press the Make Scene Transparent 
button, which will apply translucency to all displayed parts.
The import process also created feature curves for each region during the import process:
If you want to highlight the feature curves in your own model, select the Regions>Body 1>Feature Curves>Feature Curves 1 node (for example) to display the edges for the first region. The feature curves are adequately defined in this case and need no further modification.
