We've released a new horizontal theme which is awesome for displaying sets of Photos - it's called Carousel. Like all our themes it works great on smartphones and tablets too. It comes in a dark and light version which you can then customize to your preferences using the Theme Editor.
NOTE that this theme is currently in beta which means we will be actively releasing updates to it and expanding what you can customize via the Theme Editor.
Try the new Theme on your portfolio today by visiting the customize area.