I am having problems with a scene exported from Blender 2.8 using gltf2.
The scene loads but some normal of horizontal faces are inverted by BabylonJS. If I flip a particular horizontal face and re-export the Babylon still shows the normal inverted (no effect flipping in blender). Sandbox shows fine but it seems that faces get material applied in both sides:
The following link has my test code and the Blender file:
Thanks in advance,