With the (curently free) Trimble App Visualiser (download in the Trimble Connect App Store)
you can visualise (SketchUp) Models using the Unity engine:
But you cannot edit materials like you can in Tekla Structures.
Though the material library is currently limited:
The Visualizer comes with a built-in material library. These materials cannot be created or edited. The currently available materials in the visualizer catalog are:
It would be nice if Trimble Connect Visualiser would recognize SketchUp materials, as well!