In early silent films, text cards called intertitles appeared between scenes to explain what was happening or to show dialogue. In the proposedTryptich format, the **Interstitial** plays a similar role, but instead of filling gaps in the story, it opens them - wikipedia 
An Interstitial is a short moment between sequences — a cut-space that gives the reader or viewer room to shift direction. It might link out to another page, show an image, or suggest a new connection. It’s a small pause that invites exploration.
Where a Scene describes what happens, the Interstitial shows what could happen next. It’s the hinge between one part and another, or a quiet space where something unexpected can begin.