Hi,
Probably there is a bug in occlusion queries - http://www.babylonjs-playground.com/#QDAZ80#15
Here a label is a thing that appears/disappears depending on the visibility of a sphere. I've noticed Occlusion Query takes into account only meshes that were created before it was enabled. If I add a box later - BJS doesn't understand that a sphere is behind the new box and my label stays visible.
In my demo - in the beginning the label is not visible because the sphere is not visible, it's good. However, if you go to the right behind the box - label will always be visible.
Is it normal and can be configured somehow or it's a bug?