Trimble Connect/SiteVision will not currently accept FBX models. Current design in Civil3D has to go to Infrwrawks for modeling, then to 3DS max, then back to Civil3D and then to Trimble Connect. Being able to integrate better with SiteVision would be a huge help in taking the design to the field and showing clients what their project will look like. The current process is very clunky and could easily be simplified.