Good Morning,
first of all sorry for my english...i'll try to explain what is my problem clearly

- i have a 3ds file of a building
- i have imported it into Navisworks
- i have also imported a gantt produced with project
- i have linked all the building with gantt and now i have exported an animation of site evolution

my problem now is: i would like to add other particulars outside the building like trees and streets and parking....

how can i modify the original 3ds file, and put it with all modification inside naviswork program, without losing all the work done before?

I mean, i would like to add a new phase at animation of my building in navisworks but i do not want to do all the work of link object to gantt from the beginning!

thank you so much for your help