A process includes obtaining a set of images compositable to depict different design configurations; providing a first user interface by which members of the set are overlaid responsive to user inputs to depict different design configurations; obtaining a first design configuration specified via the first user interface; and providing a second user interface depicting a field of view having a first portion depicting the first design configuration and a second porting depicting a second design configuration, the second user interface being operative to adjust allocation in pixel space of the field of view between the first portion and the second portion responsive to user input.