Under the supervision of VFX Supervisor Lise Fischer, working alongside VFX Producer Loriane Lucas, MPC Paris assembled a team of 30 artists over 4 months to create and integrate more than 100 visual effects shots in The Great Arch. One of the major challenges was precisely recreating the construction site at different stages of its development.

To remain faithful to historical reality while respecting the filmmaker’s vision and production constraints, the decision was made to use archival footage as the primary material for all wide shots establishing key sequences. The team combined advanced digital techniques — CGI environments, matte painting and compositing — with meticulous documentary research based on historical archives.