I would likely use the phrase interrupting the view.
That seems to be a rather common way to express this:
Washington flanked the entry gates with mounds and ha-ha walls, hidden harriers that keep cattle from the bowling green without interrupting the view from the house. (Gardens of America: Three Centuries of Design, by D.K. McGuire)
Already, pallets of glazed brick stacked higher than a man's head stood at random, interrupting the view across the open floor. (Empire State, E.A. Pollitz)
The Culzean viaduct was to have had towers along its length but their superstructures, interrupting the view to the castle, were omitted. (Masterpieces of Architectural Drawing, H. Powell & D. Leatherbarrow)
With that backdrop, I'd say:
There were no partitions separating one division from another; the only things interrupting the view were the columns supporting the ceiling.