3.4.View Fading
If you want to add view fading to camera overlaps likely the easiest method is to add a collision box at the front of the camera, set to match just over the view frame.
You can check for initial overlaps / when all overlaps are cleared then with something like the nodes below.
You could also run view fading / mitigation or some other logic during push back of any sort by binding to the OnBegin and OnEnd WallPushBack events and handling logic in there.