The mixer camera can't see the object behind it.

Adjust the value of the camera. Press the O key to enter the camera angle. If you want to render the whole object, the display will be incomplete, but the normal angle can be displayed, but the camera angle can't see the object, that is, the camera value is too large. After adjustment, you can see the object. These are the reasons why the mixer camera can't see the objects behind it and the solutions.