In 3dmax, the camera is in the room. Why can you see outside the room? Solve, how can we make the camera only look indoors, not outdoors, and the proportion remains unchanged?

1, it is usually difficult to create such a non-viewing effect on the camera view. This doesn't look like a camera view. Take a good look at it. Sometimes when the input method is switched, pressing the shortcut key doesn't respond, and then see if you accidentally press D to disable the automatic refresh of the current viewport. Your view has a safety box.

2. Check whether the cutting plane of the camera is open.