Either wild walls and ceilings, global scaling of base structure to allow the camera plane room to get into the structure with your figure(s), or if the set is of a shape or type that precludes this, camera 'pockets'; set sections like ventilator grills that are one sided polygons with a dead space behind them to allow the camera to tilt and pan (at least within the limits of the opening the view is through) without clipping outside of the room. Hm. I wonder if any of the python masters could create a plugin that would allow you to set a marker, then would create a scaled camera at each marker location? The marker primitive could be scaled so that you would know the camera fustrum is inside the structure, and it would allow you to set cameras -once- in a structure, and then reuse them as needed....