Hi,
I can try to help you out here. However, there is not feature to change the columns on Photo View.
The layout is created using the Isotope Script.
Then we run a script to initialize Isotope on that page.
/events-calendar-pro/resources/tribe-events-photo-view.min.js
Non-minified Version:
/events-calendar-pro/resources/tribe-events-photo-view.js
So to change the formatting you can wp_dequeue_script the first script and then replace it with your own.
Unfortunately, that is the only way to get this done right now and it is beyond the support we can provide to do this customization. I can try to help out a little more with questions.
Thanks