The subject was a research session on transparency and form resistance and how it can be combined.
This leads us to work on the fault and what it could generate. The fault in the paper weaken it, makes it fragile but when you combine with a particular system two fragile papers, it generates a strong structure and a rich game on the lighting and transparency. Depending on the direction in which you look trough the fault, you either see something really bright or something really dark.