in some angle ,the cylinder is not fully displayed

1. A concise explanation of the problem you’re experiencing.


2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.

3. Context. Why do you need to do this? We might know a better way to accomplish your goal.

4. The Cesium version you’re using, your operating system and browser.

Can you provide an Sandcastle exemple of your code ?