A straight stucco cornice as a Geometry Nodes modifier: three profiles (Crown, Cyma Recta, Chair Rail), 45° mitres at both ends, an optional dentil row, profile size and projection, UV map, two procedural plaster materials. Blender 4.2+ (tested 4.2.23, 4.5.14, 5.2.1; 23 cases). The full version adds panel frames, arched surrounds with keystone, ceiling rosettes, seven more profiles and three more ornament rows. AI-assisted: build scripts written with an AI coding assistant; images are Cycles renders of the shipped file.