If I can give my two cents, I have used with much success Twinmotion in the past, and knowing underneath it is an Unreal Engine product, with a very interesting user interface, it would be amazing to have a workflow where we could syncronize with Twinmotion ( which already has many import/export plugins, such as Revit and SketchUp ), work the model further on Twinmotion, adding textures and models such as furniture, trees, and when done, import the Twinmotion model into the Unreal Studio for final use.
Having Unreal and VRay coupled is a really dreamy combination, one I really look forward to using with Archicad. I am doing tests with FBX, but having a “Export to Datasmith” within Twinmotion would right now be an amazing thing, considering ( and oversimplifying here ) it is possible to use Twinmotion to set up the model with great ease.