On this PG, when I move the camera to the left to see the sphere, it appears.
But if I move the camera to the right to see the sphere, it does not appear.
She also appears if I look from behind. It's only from the right that I do not see it. or I must approach very very ready.
try to move the camera to the right to look at the sphere, it will not appear.
Try to the left or the back, it will appear.
http://www.babylonjs-playground.com/#QDAZ80#10
Super feature by the way 