how to analyse the visibility from some point to another point(with 3dTile model)

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.

Do you mean like described in this thread?

If so, see the answer there as well!