First, THANK YOU for the easy GLB converter!
Here is a link to a sample FB post with the 3d model:
Looks great on desktop browser, but the lighting is doing some funky stuff when viewed on mobile. There is a very bright pinpoint light emiting on one of the panels, and the other panels are darker when you spin it, like the sun is moving with the box. Any way you know to combat this? Or, is it a FB limitation since these 3D model posts are still in their infancy?
Customer support service by UserEcho