Getting DTM in a DXF format

I need to give the client the DTM file in a DXF format.
Right now its in the Georeff Tiff format.

How do i convert it over to DXF with all the Geo Meta data been converted as well.

Regards
Pete

As of today, the DTM is only generated as a Geotiff. You might be able to convert it using a 3rd party software, but this particular output cannot be generated by Pix4D. 

Regards,