You can visit TruPlace at https://go.truplace.com/ to register and have your property 3D-processed.
Once the processing is done, you will have a URL of your property's 3D walkthrough. Then you can proceed to the Hostfully PMP Integration page and toggle ON TruPlace.
After that, you can just go back to the Property's Photos tab, insert the TruPlace URL, then Save and that's it.
You can visit your Direct Booking Page to see the 3D product, which should be at the top, where the View Photos section is.
If you have any question, please contact firstname.lastname@example.org.