draw a corridor entity over cesium 3d tileset feature

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

when i am trying to create a corridor entity over the cesium 3d tile feature like building, it provides a distorted hollow geometry with outer boundaries well posed.

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 a Sandcastle example of how you’re creating this corridor, and describe a bit more what you expect it to look like vs what it looks like?