Improved Collada Export Support for Sketchfab
Bump-mapping (embossing/debossing) and metal texture support for Collada exports (to the Sketchfab service) has been added:

Impact Licensing – Service Update
Throughout today (Dec 2nd), our licensing service provider, Nalpeiron, experienced several outages caused by issues at their hosting provider, Azure. Nalpeiron has confirmed that full service has now been restored, they do not expect further disruption, and they are implementing additional safeguards to mitigate similar issues in the future.
Bump-mapping (embossing/debossing) and metal texture support for Collada exports (to the Sketchfab service) has been added:
