I have a scene where I load in around 10,000 entities via czml with 3d models attached to each. I have it so when you are at a specific zoom level, the models will disappear. However, even when zoomed out, when the models should not be visible, the performance is still the same just as if the models are there. So my question is, how should I optimize this so that this scene will run better? Here is the sandcastle link: t.ly/c_9C
Thanks!