1. A concise explanation of the problem you’re experiencing.
I want to build a 3D map that will show underground objects, how do I display underground objects in Cesium?
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.