Hi.
The situation you are dealing with is connected to the camera frustum, and so called near and far clipping planes. If you worked in any 3D software you would experience same problem for the small object.
Basically, your camera near plane is clipping the object. Here you can see the image representation of what I am talking about.
You just have to set your near plane, so it doesn’t clip through the object.
https://playground.babylonjs.com/#TIYKC2#2 (line 71)