Two-dimensional —> Three-dimensional
Piranesi collapsed the antiquities of Tome onto a two-dimensional, subjective image. Similarly, cities are now represented by layers of flattened icons on postcards, which only shows a selective part of the city (that is flattened and removed), brushing all other context behind and in between the layers of two-dimensional icons.
The pop-up finds/ punctures cavities by pulling the layers of these two-dimensional icons apart, acting as infills between the layers, providing a 3-dimensional space which aims to draw the viewers in and to be experienced rather than to be viewed upon in a detached way.
Permanent —> Temporary
As Gandy was asked by Soane to position his architecture with the antiquity, to turn his architecture to “permanent”, the pop-up challenge the value of permanent in the present society. While the “permanent” is trying to proof that architecture can with stand time, in the fast changing world that we live in, can the “permanent” architecture keep up with the paste? What is stopping the Permanent becoming Stagnant? The pop-up represent temporary architecture that leaves in a permanent legacy.