Cornice - Trim, Skirting & Crown Molding Tool

Roblox interiors look like boxes: a room is six boxes. Real architecture has articulated edges. Cornice adds them. Select some walls, pick a profile, press Apply: skirting at the floor, a cornice at the ceiling, a chair rail, or piers on the corners. Any size or rotation, mitred where runs meet. The corners are the product. By hand, a corner is either a square hole or double thickness. Cornice's runs share a plane and nothing else: the largest shared volume between two runs is zero. Rotation is no special case: it is all computed in the part's local space. Measured deviation across five yaws and a three-axis tilt: 0.000000 studs. Trim has CanCollide, CanQuery and CanTouch off, so it never blocks a player or a raycast. It lives in a Cornice folder inside the part. 5 profiles, scale 0.25x-4x, 20 walls in 6 ms, Ctrl+Z undoes a run in one step. It decorates parts you already built: no wall building, and it does not follow a moved wall. Editor only, nothing runs in your game.