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SURFACE MULLIONS - Oriented Mullion Generator - Grasshopper Script — Grasshopper script for Rhino, preview 1 of 2

SURFACE MULLIONS - Oriented Mullion Generator - Grasshopper Script — Grasshopper script for Rhino, preview 2 of 2

SURFACE MULLIONS - Oriented Mullion Generator - Grasshopper Script

Name: SURFACE MULLIONS - Oriented Mullion Generator - Grasshopper Script
Brand: Calvin Rogers Lab
Price: 19.99 USD
Availability: InStock

$19.99

⚡ Instant download — your files are ready right after checkout.

Surface Mullions — Rhino and Grasshopper Tool for Automatic Mullion Placement on Any Surface

📐 A Rhino and Grasshopper tool that automatically places mullions across a surface at any spacing — built to handle trimmed surfaces, irregular boundaries, surfaces with holes, and curved geometry. Set the surface, spacing, and mullion dimensions, and the script generates a clean, oriented mullion grid ready to bake.

What's inside

📐 Full Grasshopper definition (.gh) — the complete tool, ready to drop into your workflow.

⚙️ Parametric controls — adjust approximate panel spacing, interior mullion size, and exterior boundary mullion size independently.

🪟 Mullion placement workflow — automatically orients mullions across trimmed, untrimmed, and irregular boundary surfaces.

🏛️ Hole and cutout support — handles surfaces with one or multiple interior openings.

🎯 Bake-ready output — clean Rhino geometry split into interior and boundary mullion groups.

📁 Example setup — included in the product images and video for reference.

Specs

Type: Grasshopper definition (.gh) Skill level: Beginner to intermediate Grasshopper users
Inputs: Surface, panel size, interior and exterior mullion size, bake controls Outputs: Oriented mullion geometry, bake-ready Rhino geometry Delivery: ⬇️ Instant download

Compatible with

Rhinoceros 3D · Grasshopper

Perfect for

Façade studies where mullion patterns need to update quickly as the design shifts; skylight layouts and roof glazing systems; canopy mullion grids and atrium roof studies; panelized surface studies and conceptual curtain wall layouts; irregular surface subdivision and free-form design exploration; early and schematic design phases where speed matters more than fabrication detail; architecture students and professionals automating repetitive Rhino + Grasshopper work.

How to use

⚡ Download the .gh file from your account dashboard after purchase.
Open Rhino and launch Grasshopper.
Open the Surface Mullions definition in the Grasshopper canvas.
Reference your design surface from Rhino into the definition.
Adjust the spacing and mullion size sliders until the layout reads as intended, then bake the geometry.

License

✅ Single-user license — for personal, academic, and professional use by one user (façade studies, design exploration, conceptual layouts). This tool is intended for design studies and workflow acceleration, not fabrication-ready curtain wall engineering — always review and coordinate final geometry to your project requirements. Resale, redistribution, repackaging, or uploading the definition as your own product is prohibited.

SURFACE MULLIONS - Oriented Mullion Generator - Grasshopper Script

Surface Mullions — Rhino and Grasshopper Tool for Automatic Mullion Placement on Any Surface

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