When it comes to the restitution of built heritage, realistic 3D images tell a very convincing narrative about something generally full of uncertainty. Indeed, those restitutions are hypothetical. Their accuracy varies according to the number and the quality of the archives describing them. For five years, AlICe lab (ULB) has been working on the restitution of two Brussels Art Nouveau iconic buildings: Horta’s Maison du Peuple and Hoffmann’s Palais Stoclet. This talk presents a workflow hosted in Blender’s environment that accounts for 3D models’ “degrees of certainty” through the systematic connection of the restitution to its archives.