Sketchfab is excellent and getting better month by month. As a way of expanding its usability beyond a display platform to a fully functional learning tool it would be great to allow the construction of a guided tour through the 3D object, similar to that used currently by the Smithsonian X3D. See: http://3d.si.edu/tour/1903-wright-flyer-hotspot-tour.
This could include:
- Stage by stage progress through the environment with separate hotspots
- Embedded popup of images, sound, video
- Interface layout templates for viewer presentations.
These could greatly enhance Sketchfab.