Hi Rick,
Yes, it is possible to export a complex terrain to a DTM. I have gone through the process Appending terrains to a new complex terrain and then exporting to DTM. The DTM loads and displays fine.
If you'd like, you can upload your DGN with terrains to the link below and I will test for you.
bentley.sharefile.com/r-re0ecb6270494a1f8
Thanks,
Sanders
Yes, it is possible to export a complex terrain to a DTM. I have gone through the process Appending terrains to a new complex terrain and then exporting to DTM. The DTM loads and displays fine.
If you'd like, you can upload your DGN with terrains to the link below and I will test for you.
bentley.sharefile.com/r-re0ecb6270494a1f8
Thanks,
Sanders