@theluthier Adding unique objects is exactly what I was thinking especially for the still relatively empty wall’s in the background. Additionally to your proposal maybe an (emergency) exit and two or three surveillance cams?
@theluthier @spikeyxxx One technical point: When I set the “Render Cam” to the current “Viewport Cam” position (CTRL + ALT + Numpad 0) the “Field of View” isn’t the same with the default settings although the “Viewport Cam” and the “Render Cam” have the same focal length (default: 50 mm):

After setting the “Render Cam’s” sensor size to 72mm (Auto Fit), there’s almost no difference between both cams:

Is there a method to find the optimal setting so that “Render Cam” and “Viewport Cam” have the exact same “Field of View”?