Chris - very simple.
Just print the dgn, but before you tick the print to 3d box.
Make sure you are using the Bentley pdf driver, which can be selected form the same panel.
Once it is exported as a 3d pdf make sure you use an Adobe pdf viewer as it won't work with any other generic pdf viewer
Just print the dgn, but before you tick the print to 3d box.
Make sure you are using the Bentley pdf driver, which can be selected form the same panel.
Once it is exported as a 3d pdf make sure you use an Adobe pdf viewer as it won't work with any other generic pdf viewer