This model used to look fine. See https://sketchfab.com/models/01b45d0a94224a57b20e219a43483fb3
When I go to edit the lighting to see what's wrong, it looks fine. On the main page the model looks black, however. I can provide screen shots if you don't see the same problem.
Chrome, Windows 7, my Quadro K4000 driver is up to date.
Here's what I see: http://s26.postimg.org/5buws4is9/factions_black.jpg
But, then I just tried to reload the page in another browser tab and things were fine! See http://s26.postimg.org/c3lbuz7rt/factions_ok.jpg
I don't know why there's a difference, or what made it go away.