These altarpiece constructions are more conceptually based. They evolved from the original series based on individuals, or "personal saints." All of these are influenced more by the box constructions of Joseph Cornell. Interactivity plays a higher role as the series continues.
Details about the production of these works can be found at Tyrus' Eye on Art.
The video below shows the actual process of building one of these works, exploring each of the steps that takes place before the painting of the panels even begins.