How to set the camera postion into underground area

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

Hi, I have a question about setting/moving the camera into underground area. Since some 3dtiles that my colleagues made are underground models. I need a method to view them. Thanks for help.

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

No code yet.

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

As decribed before.

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

version 1.52

Underground support is something that’s been on our radar for a long time, check out this experimental PR that attempts to add support for it:

There seems to be a fair bit of issues to resolve to get that to fully work. If you’re just concerned about the camera, I wonder if just turning off the terrain adjustment/collision check will do the trick. This PR attempts to make that configurable:

Let me know if that helps! I’m definitely curious to hear if you’re able to get this to work successfully.