Procedural Openings is a Blender add-on that uses Geometry Nodes to generate fully customizable doors, windows, and ventilators. The tool enables users to create a wide variety of fenestrations with control over opening types, styles, and directions.

The system includes extensive customization options for frames, shutters, and hardware. Users can select from various shutter types, panel styles, and materials, while adjusting parameters for cross rails, mullions, and thresholds. The add-on supports multiple opening styles including hinged, pocket, pivot, bifold, and sliding configurations. It also features custom frame profiles, arch opening adjustments, and a baking system to improve viewport performance during customization.