What is this area of ​​an object in Unity?

Question

Unity

Good evening. Please tell me what is this area that I shaded?

Answer 1

This problem is related to the fact that the borders of the collider intersect the camera object itself and thus the camera is inside the collider. There are two ways to solve.
1) Raise the camera to such a distance that the border of the collider does not reach the camera.
2) Use your personal assembled one, namely Mesh Collider, instead of the standard collider.