With the menu item Special features 
Fractures 2D-fractures from LERA vertical and horizontal fractures can be inserted in a 3D model. This is based on the Python script "lera2kluft.py", which runs automatically when you click this menu item.
If the data type LERA (leakage for a polygon) is available the 2D fractures are written with their opening width in the * .3d file of the model.
The opening widths correspond to the values of the respective LERA-range. They have to be assigned by the user with the appropriate values.